Home / 138,414.19-207,621.31-79,208

Finding the Fourth Proportional to 138,414.19, 207,621.31 and 79,208

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Solution

The fourth proportional to 138,414.19, 207,621.31 and 79,208 is: 118,812.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,414.19 : 207,621.31 = 79,208 : x
  2. Step 2: Convert to fraction form
    138,414.19/207,621.31 = 79,208/x
  3. Step 3: Cross multiply
    138,414.19x = 207,621.31 × 79,208
  4. Step 4: Simplify right side
    138,414.19x = 16,445,268,722.48
  5. Step 5: Solve for x
    x = 16,445,268,722.48/138,414.19
  6. Step 6: Final answer
    x = 118,812.01

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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.