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Finding the Fourth Proportional to 123,114.28, 169,859.92 and 75,317.80

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Solution

The fourth proportional to 123,114.28, 169,859.92 and 75,317.80 is: 103,915.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,114.28 : 169,859.92 = 75,317.80 : x
  2. Step 2: Convert to fraction form
    123,114.28/169,859.92 = 75,317.80/x
  3. Step 3: Cross multiply
    123,114.28x = 169,859.92 × 75,317.80
  4. Step 4: Simplify right side
    123,114.28x = 12,793,475,482.58
  5. Step 5: Solve for x
    x = 12,793,475,482.58/123,114.28
  6. Step 6: Final answer
    x = 103,915.45

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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.