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Finding the Fourth Proportional to 123,425.46, 170,318.21 and 72,440.21

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Solution

The fourth proportional to 123,425.46, 170,318.21 and 72,440.21 is: 99,962.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,425.46 : 170,318.21 = 72,440.21 : x
  2. Step 2: Convert to fraction form
    123,425.46/170,318.21 = 72,440.21/x
  3. Step 3: Cross multiply
    123,425.46x = 170,318.21 × 72,440.21
  4. Step 4: Simplify right side
    123,425.46x = 12,337,885,685.43
  5. Step 5: Solve for x
    x = 12,337,885,685.43/123,425.46
  6. Step 6: Final answer
    x = 99,962.24

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.