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Finding the Fourth Proportional to 80,951.29, 111,799.91 and 61,624.89

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Solution

The fourth proportional to 80,951.29, 111,799.91 and 61,624.89 is: 85,108.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,951.29 : 111,799.91 = 61,624.89 : x
  2. Step 2: Convert to fraction form
    80,951.29/111,799.91 = 61,624.89/x
  3. Step 3: Cross multiply
    80,951.29x = 111,799.91 × 61,624.89
  4. Step 4: Simplify right side
    80,951.29x = 6,889,657,155.76
  5. Step 5: Solve for x
    x = 6,889,657,155.76/80,951.29
  6. Step 6: Final answer
    x = 85,108.68

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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.