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Finding the Fourth Proportional to 71,425.32, 98,572.80 and 39,604.56

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Solution

The fourth proportional to 71,425.32, 98,572.80 and 39,604.56 is: 54,657.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,425.32 : 98,572.80 = 39,604.56 : x
  2. Step 2: Convert to fraction form
    71,425.32/98,572.80 = 39,604.56/x
  3. Step 3: Cross multiply
    71,425.32x = 98,572.80 × 39,604.56
  4. Step 4: Simplify right side
    71,425.32x = 3,903,932,371.97
  5. Step 5: Solve for x
    x = 3,903,932,371.97/71,425.32
  6. Step 6: Final answer
    x = 54,657.54

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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.