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Finding the Fourth Proportional to 123,029.83, 169,781.16 and 66,441.20

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Solution

The fourth proportional to 123,029.83, 169,781.16 and 66,441.20 is: 91,688.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,029.83 : 169,781.16 = 66,441.20 : x
  2. Step 2: Convert to fraction form
    123,029.83/169,781.16 = 66,441.20/x
  3. Step 3: Cross multiply
    123,029.83x = 169,781.16 × 66,441.20
  4. Step 4: Simplify right side
    123,029.83x = 11,280,464,007.79
  5. Step 5: Solve for x
    x = 11,280,464,007.79/123,029.83
  6. Step 6: Final answer
    x = 91,688.85

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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.