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Finding the Fourth Proportional to 72,648.20, 108,972.30 and 63,432.20

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Solution

The fourth proportional to 72,648.20, 108,972.30 and 63,432.20 is: 95,148.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,648.20 : 108,972.30 = 63,432.20 : x
  2. Step 2: Convert to fraction form
    72,648.20/108,972.30 = 63,432.20/x
  3. Step 3: Cross multiply
    72,648.20x = 108,972.30 × 63,432.20
  4. Step 4: Simplify right side
    72,648.20x = 6,912,352,728.06
  5. Step 5: Solve for x
    x = 6,912,352,728.06/72,648.20
  6. Step 6: Final answer
    x = 95,148.30

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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.