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Finding the Fourth Proportional to 123,725.79, 170,732.21 and 72,740.61

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Solution

The fourth proportional to 123,725.79, 170,732.21 and 72,740.61 is: 100,376.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,725.79 : 170,732.21 = 72,740.61 : x
  2. Step 2: Convert to fraction form
    123,725.79/170,732.21 = 72,740.61/x
  3. Step 3: Cross multiply
    123,725.79x = 170,732.21 × 72,740.61
  4. Step 4: Simplify right side
    123,725.79x = 12,419,164,738.35
  5. Step 5: Solve for x
    x = 12,419,164,738.35/123,725.79
  6. Step 6: Final answer
    x = 100,376.52

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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.