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Finding the Fourth Proportional to 70,532.60, 105,825.92 and 42,472.71

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Solution

The fourth proportional to 70,532.60, 105,825.92 and 42,472.71 is: 63,725.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    70,532.60 : 105,825.92 = 42,472.71 : x
  2. Step 2: Convert to fraction form
    70,532.60/105,825.92 = 42,472.71/x
  3. Step 3: Cross multiply
    70,532.60x = 105,825.92 × 42,472.71
  4. Step 4: Simplify right side
    70,532.60x = 4,494,713,398.28
  5. Step 5: Solve for x
    x = 4,494,713,398.28/70,532.60
  6. Step 6: Final answer
    x = 63,725.33

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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.