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Finding the Fourth Proportional to 71,948.20, 107,922.30 and 71,487.40

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Solution

The fourth proportional to 71,948.20, 107,922.30 and 71,487.40 is: 107,231.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,948.20 : 107,922.30 = 71,487.40 : x
  2. Step 2: Convert to fraction form
    71,948.20/107,922.30 = 71,487.40/x
  3. Step 3: Cross multiply
    71,948.20x = 107,922.30 × 71,487.40
  4. Step 4: Simplify right side
    71,948.20x = 7,715,084,629.02
  5. Step 5: Solve for x
    x = 7,715,084,629.02/71,948.20
  6. Step 6: Final answer
    x = 107,231.10

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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.