Home / 100,385.85-138,533.18-55,064.16

Finding the Fourth Proportional to 100,385.85, 138,533.18 and 55,064.16

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Solution

The fourth proportional to 100,385.85, 138,533.18 and 55,064.16 is: 75,988.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,385.85 : 138,533.18 = 55,064.16 : x
  2. Step 2: Convert to fraction form
    100,385.85/138,533.18 = 55,064.16/x
  3. Step 3: Cross multiply
    100,385.85x = 138,533.18 × 55,064.16
  4. Step 4: Simplify right side
    100,385.85x = 7,628,213,188.83
  5. Step 5: Solve for x
    x = 7,628,213,188.83/100,385.85
  6. Step 6: Final answer
    x = 75,988.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.