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Finding the Fourth Proportional to 84,510.47, 126,724.70 and 42,372.45

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Solution

The fourth proportional to 84,510.47, 126,724.70 and 42,372.45 is: 63,538.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,510.47 : 126,724.70 = 42,372.45 : x
  2. Step 2: Convert to fraction form
    84,510.47/126,724.70 = 42,372.45/x
  3. Step 3: Cross multiply
    84,510.47x = 126,724.70 × 42,372.45
  4. Step 4: Simplify right side
    84,510.47x = 5,369,636,120.45
  5. Step 5: Solve for x
    x = 5,369,636,120.45/84,510.47
  6. Step 6: Final answer
    x = 63,538.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.