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Finding the Fourth Proportional to 80,978.67, 121,218.80 and 52,838.19

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Solution

The fourth proportional to 80,978.67, 121,218.80 and 52,838.19 is: 79,094.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,978.67 : 121,218.80 = 52,838.19 : x
  2. Step 2: Convert to fraction form
    80,978.67/121,218.80 = 52,838.19/x
  3. Step 3: Cross multiply
    80,978.67x = 121,218.80 × 52,838.19
  4. Step 4: Simplify right side
    80,978.67x = 6,404,981,721.78
  5. Step 5: Solve for x
    x = 6,404,981,721.78/80,978.67
  6. Step 6: Final answer
    x = 79,094.68

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.