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Finding the Fourth Proportional to 80,477.88, 120,714.71 and 38,387.72

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Solution

The fourth proportional to 80,477.88, 120,714.71 and 38,387.72 is: 57,580.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,477.88 : 120,714.71 = 38,387.72 : x
  2. Step 2: Convert to fraction form
    80,477.88/120,714.71 = 38,387.72/x
  3. Step 3: Cross multiply
    80,477.88x = 120,714.71 × 38,387.72
  4. Step 4: Simplify right side
    80,477.88x = 4,633,961,691.85
  5. Step 5: Solve for x
    x = 4,633,961,691.85/80,477.88
  6. Step 6: Final answer
    x = 57,580.56

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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.