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Finding the Fourth Proportional to 80,630.76, 120,894.30 and 38,488.08

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Solution

The fourth proportional to 80,630.76, 120,894.30 and 38,488.08 is: 57,707.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,630.76 : 120,894.30 = 38,488.08 : x
  2. Step 2: Convert to fraction form
    80,630.76/120,894.30 = 38,488.08/x
  3. Step 3: Cross multiply
    80,630.76x = 120,894.30 × 38,488.08
  4. Step 4: Simplify right side
    80,630.76x = 4,652,989,489.94
  5. Step 5: Solve for x
    x = 4,652,989,489.94/80,630.76
  6. Step 6: Final answer
    x = 57,707.37

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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.