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Finding the Fourth Proportional to 89,115.78, 122,978.17 and 52,841.64

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Solution

The fourth proportional to 89,115.78, 122,978.17 and 52,841.64 is: 72,920.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,115.78 : 122,978.17 = 52,841.64 : x
  2. Step 2: Convert to fraction form
    89,115.78/122,978.17 = 52,841.64/x
  3. Step 3: Cross multiply
    89,115.78x = 122,978.17 × 52,841.64
  4. Step 4: Simplify right side
    89,115.78x = 6,498,368,187.00
  5. Step 5: Solve for x
    x = 6,498,368,187.00/89,115.78
  6. Step 6: Final answer
    x = 72,920.51

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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.