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Finding the Fourth Proportional to 48,460.80, 72,691.20 and 42,628.80

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Solution

The fourth proportional to 48,460.80, 72,691.20 and 42,628.80 is: 63,943.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    48,460.80 : 72,691.20 = 42,628.80 : x
  2. Step 2: Convert to fraction form
    48,460.80/72,691.20 = 42,628.80/x
  3. Step 3: Cross multiply
    48,460.80x = 72,691.20 × 42,628.80
  4. Step 4: Simplify right side
    48,460.80x = 3,098,738,626.56
  5. Step 5: Solve for x
    x = 3,098,738,626.56/48,460.80
  6. Step 6: Final answer
    x = 63,943.20

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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.