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Finding the Fourth Proportional to 78,719.70, 118,078.56 and 22,561.02

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Solution

The fourth proportional to 78,719.70, 118,078.56 and 22,561.02 is: 33,841.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,719.70 : 118,078.56 = 22,561.02 : x
  2. Step 2: Convert to fraction form
    78,719.70/118,078.56 = 22,561.02/x
  3. Step 3: Cross multiply
    78,719.70x = 118,078.56 × 22,561.02
  4. Step 4: Simplify right side
    78,719.70x = 2,663,972,753.73
  5. Step 5: Solve for x
    x = 2,663,972,753.73/78,719.70
  6. Step 6: Final answer
    x = 33,841.25

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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.