Home / 78,086.19-117,151.17-31,371.87

Finding the Fourth Proportional to 78,086.19, 117,151.17 and 31,371.87

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Solution

The fourth proportional to 78,086.19, 117,151.17 and 31,371.87 is: 47,066.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,086.19 : 117,151.17 = 31,371.87 : x
  2. Step 2: Convert to fraction form
    78,086.19/117,151.17 = 31,371.87/x
  3. Step 3: Cross multiply
    78,086.19x = 117,151.17 × 31,371.87
  4. Step 4: Simplify right side
    78,086.19x = 3,675,251,275.59
  5. Step 5: Solve for x
    x = 3,675,251,275.59/78,086.19
  6. Step 6: Final answer
    x = 47,066.60

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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.