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Finding the Fourth Proportional to 138,677.19, 208,047.11 and 43,913.13

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Solution

The fourth proportional to 138,677.19, 208,047.11 and 43,913.13 is: 65,879.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,677.19 : 208,047.11 = 43,913.13 : x
  2. Step 2: Convert to fraction form
    138,677.19/208,047.11 = 43,913.13/x
  3. Step 3: Cross multiply
    138,677.19x = 208,047.11 × 43,913.13
  4. Step 4: Simplify right side
    138,677.19x = 9,135,999,787.55
  5. Step 5: Solve for x
    x = 9,135,999,787.55/138,677.19
  6. Step 6: Final answer
    x = 65,879.61

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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.