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Finding the Fourth Proportional to 123,428.32, 170,331.04 and 66,839.68

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Solution

The fourth proportional to 123,428.32, 170,331.04 and 66,839.68 is: 92,238.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,428.32 : 170,331.04 = 66,839.68 : x
  2. Step 2: Convert to fraction form
    123,428.32/170,331.04 = 66,839.68/x
  3. Step 3: Cross multiply
    123,428.32x = 170,331.04 × 66,839.68
  4. Step 4: Simplify right side
    123,428.32x = 11,384,872,207.67
  5. Step 5: Solve for x
    x = 11,384,872,207.67/123,428.32
  6. Step 6: Final answer
    x = 92,238.74

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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.