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Finding the Fourth Proportional to 71,398.80, 106,995.80 and 52,531.60

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Solution

The fourth proportional to 71,398.80, 106,995.80 and 52,531.60 is: 78,722.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,398.80 : 106,995.80 = 52,531.60 : x
  2. Step 2: Convert to fraction form
    71,398.80/106,995.80 = 52,531.60/x
  3. Step 3: Cross multiply
    71,398.80x = 106,995.80 × 52,531.60
  4. Step 4: Simplify right side
    71,398.80x = 5,620,660,567.28
  5. Step 5: Solve for x
    x = 5,620,660,567.28/71,398.80
  6. Step 6: Final answer
    x = 78,722.06

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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.