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Finding the Fourth Proportional to 77,439.97, 106,930.18 and 63,101.96

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Solution

The fourth proportional to 77,439.97, 106,930.18 and 63,101.96 is: 87,132.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,439.97 : 106,930.18 = 63,101.96 : x
  2. Step 2: Convert to fraction form
    77,439.97/106,930.18 = 63,101.96/x
  3. Step 3: Cross multiply
    77,439.97x = 106,930.18 × 63,101.96
  4. Step 4: Simplify right side
    77,439.97x = 6,747,503,090.99
  5. Step 5: Solve for x
    x = 6,747,503,090.99/77,439.97
  6. Step 6: Final answer
    x = 87,132.05

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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.