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Finding the Fourth Proportional to 99,486.63, 137,296.62 and 56,469.15

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Solution

The fourth proportional to 99,486.63, 137,296.62 and 56,469.15 is: 77,930.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,486.63 : 137,296.62 = 56,469.15 : x
  2. Step 2: Convert to fraction form
    99,486.63/137,296.62 = 56,469.15/x
  3. Step 3: Cross multiply
    99,486.63x = 137,296.62 × 56,469.15
  4. Step 4: Simplify right side
    99,486.63x = 7,753,023,429.27
  5. Step 5: Solve for x
    x = 7,753,023,429.27/99,486.63
  6. Step 6: Final answer
    x = 77,930.31

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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.