Home / 138,719.97-191,434.21-78,293.16

Finding the Fourth Proportional to 138,719.97, 191,434.21 and 78,293.16

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Solution

The fourth proportional to 138,719.97, 191,434.21 and 78,293.16 is: 108,044.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,719.97 : 191,434.21 = 78,293.16 : x
  2. Step 2: Convert to fraction form
    138,719.97/191,434.21 = 78,293.16/x
  3. Step 3: Cross multiply
    138,719.97x = 191,434.21 × 78,293.16
  4. Step 4: Simplify right side
    138,719.97x = 14,987,989,233.00
  5. Step 5: Solve for x
    x = 14,987,989,233.00/138,719.97
  6. Step 6: Final answer
    x = 108,044.93

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.