Home / 85,507.45-128,261.48-50,422.50

Finding the Fourth Proportional to 85,507.45, 128,261.48 and 50,422.50

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Solution

The fourth proportional to 85,507.45, 128,261.48 and 50,422.50 is: 75,633.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,507.45 : 128,261.48 = 50,422.50 : x
  2. Step 2: Convert to fraction form
    85,507.45/128,261.48 = 50,422.50/x
  3. Step 3: Cross multiply
    85,507.45x = 128,261.48 × 50,422.50
  4. Step 4: Simplify right side
    85,507.45x = 6,467,264,223.19
  5. Step 5: Solve for x
    x = 6,467,264,223.19/85,507.45
  6. Step 6: Final answer
    x = 75,633.93

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Half scale
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Double scale
Find fourth proportional to 85,508.45, 128,262.98 and 50,423.50
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.