Home / 138,089.16-207,142.38-54,981

Finding the Fourth Proportional to 138,089.16, 207,142.38 and 54,981

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Solution

The fourth proportional to 138,089.16, 207,142.38 and 54,981 is: 82,474.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,089.16 : 207,142.38 = 54,981 : x
  2. Step 2: Convert to fraction form
    138,089.16/207,142.38 = 54,981/x
  3. Step 3: Cross multiply
    138,089.16x = 207,142.38 × 54,981
  4. Step 4: Simplify right side
    138,089.16x = 11,388,895,194.78
  5. Step 5: Solve for x
    x = 11,388,895,194.78/138,089.16
  6. Step 6: Final answer
    x = 82,474.94

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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.