Home / 138,440.30-207,660.45-137,128.10

Finding the Fourth Proportional to 138,440.30, 207,660.45 and 137,128.10

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Solution

The fourth proportional to 138,440.30, 207,660.45 and 137,128.10 is: 205,692.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,440.30 : 207,660.45 = 137,128.10 : x
  2. Step 2: Convert to fraction form
    138,440.30/207,660.45 = 137,128.10/x
  3. Step 3: Cross multiply
    138,440.30x = 207,660.45 × 137,128.10
  4. Step 4: Simplify right side
    138,440.30x = 28,476,082,953.65
  5. Step 5: Solve for x
    x = 28,476,082,953.65/138,440.30
  6. Step 6: Final answer
    x = 205,692.15

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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.