Home / 85,415.40-128,232.45-45,466.20

Finding the Fourth Proportional to 85,415.40, 128,232.45 and 45,466.20

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Solution

The fourth proportional to 85,415.40, 128,232.45 and 45,466.20 is: 68,257.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,415.40 : 128,232.45 = 45,466.20 : x
  2. Step 2: Convert to fraction form
    85,415.40/128,232.45 = 45,466.20/x
  3. Step 3: Cross multiply
    85,415.40x = 128,232.45 × 45,466.20
  4. Step 4: Simplify right side
    85,415.40x = 5,830,242,218.19
  5. Step 5: Solve for x
    x = 5,830,242,218.19/85,415.40
  6. Step 6: Final answer
    x = 68,257.51

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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.