Home / 138,439.30-207,513.14-71,808.70

Finding the Fourth Proportional to 138,439.30, 207,513.14 and 71,808.70

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Solution

The fourth proportional to 138,439.30, 207,513.14 and 71,808.70 is: 107,637.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,439.30 : 207,513.14 = 71,808.70 : x
  2. Step 2: Convert to fraction form
    138,439.30/207,513.14 = 71,808.70/x
  3. Step 3: Cross multiply
    138,439.30x = 207,513.14 × 71,808.70
  4. Step 4: Simplify right side
    138,439.30x = 14,901,248,816.32
  5. Step 5: Solve for x
    x = 14,901,248,816.32/138,439.30
  6. Step 6: Final answer
    x = 107,637.42

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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.