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Finding the Fourth Proportional to 138,787.60, 208,119.84 and 63,889.60

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Solution

The fourth proportional to 138,787.60, 208,119.84 and 63,889.60 is: 95,806.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,787.60 : 208,119.84 = 63,889.60 : x
  2. Step 2: Convert to fraction form
    138,787.60/208,119.84 = 63,889.60/x
  3. Step 3: Cross multiply
    138,787.60x = 208,119.84 × 63,889.60
  4. Step 4: Simplify right side
    138,787.60x = 13,296,693,329.66
  5. Step 5: Solve for x
    x = 13,296,693,329.66/138,787.60
  6. Step 6: Final answer
    x = 95,806.06

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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.