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Finding the Fourth Proportional to 123,107.89, 169,859.95 and 74,708.72

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Solution

The fourth proportional to 123,107.89, 169,859.95 and 74,708.72 is: 103,080.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,107.89 : 169,859.95 = 74,708.72 : x
  2. Step 2: Convert to fraction form
    123,107.89/169,859.95 = 74,708.72/x
  3. Step 3: Cross multiply
    123,107.89x = 169,859.95 × 74,708.72
  4. Step 4: Simplify right side
    123,107.89x = 12,690,019,681.64
  5. Step 5: Solve for x
    x = 12,690,019,681.64/123,107.89
  6. Step 6: Final answer
    x = 103,080.48

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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.