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Finding the Fourth Proportional to 71,991.40, 108,116.70 and 52,292.20

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Solution

The fourth proportional to 71,991.40, 108,116.70 and 52,292.20 is: 78,532.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,991.40 : 108,116.70 = 52,292.20 : x
  2. Step 2: Convert to fraction form
    71,991.40/108,116.70 = 52,292.20/x
  3. Step 3: Cross multiply
    71,991.40x = 108,116.70 × 52,292.20
  4. Step 4: Simplify right side
    71,991.40x = 5,653,660,099.74
  5. Step 5: Solve for x
    x = 5,653,660,099.74/71,991.40
  6. Step 6: Final answer
    x = 78,532.44

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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.