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Finding the Fourth Proportional to 80,652.61, 111,306.45 and 48,388.63

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Solution

The fourth proportional to 80,652.61, 111,306.45 and 48,388.63 is: 66,779.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,652.61 : 111,306.45 = 48,388.63 : x
  2. Step 2: Convert to fraction form
    80,652.61/111,306.45 = 48,388.63/x
  3. Step 3: Cross multiply
    80,652.61x = 111,306.45 × 48,388.63
  4. Step 4: Simplify right side
    80,652.61x = 5,385,966,581.03
  5. Step 5: Solve for x
    x = 5,385,966,581.03/80,652.61
  6. Step 6: Final answer
    x = 66,779.82

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.