Home / 138,356.18-207,271.76-82,077.38

Finding the Fourth Proportional to 138,356.18, 207,271.76 and 82,077.38

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Solution

The fourth proportional to 138,356.18, 207,271.76 and 82,077.38 is: 122,960.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,356.18 : 207,271.76 = 82,077.38 : x
  2. Step 2: Convert to fraction form
    138,356.18/207,271.76 = 82,077.38/x
  3. Step 3: Cross multiply
    138,356.18x = 207,271.76 × 82,077.38
  4. Step 4: Simplify right side
    138,356.18x = 17,012,323,008.79
  5. Step 5: Solve for x
    x = 17,012,323,008.79/138,356.18
  6. Step 6: Final answer
    x = 122,960.34

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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.