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Finding the Fourth Proportional to 86,352.52, 129,543.56 and 39,609.40

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Solution

The fourth proportional to 86,352.52, 129,543.56 and 39,609.40 is: 59,420.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,352.52 : 129,543.56 = 39,609.40 : x
  2. Step 2: Convert to fraction form
    86,352.52/129,543.56 = 39,609.40/x
  3. Step 3: Cross multiply
    86,352.52x = 129,543.56 × 39,609.40
  4. Step 4: Simplify right side
    86,352.52x = 5,131,142,685.46
  5. Step 5: Solve for x
    x = 5,131,142,685.46/86,352.52
  6. Step 6: Final answer
    x = 59,420.88

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1.5x scale

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.