Home / 78,138.29-117,209.17-54,098.91

Finding the Fourth Proportional to 78,138.29, 117,209.17 and 54,098.91

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Solution

The fourth proportional to 78,138.29, 117,209.17 and 54,098.91 is: 81,149.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,138.29 : 117,209.17 = 54,098.91 : x
  2. Step 2: Convert to fraction form
    78,138.29/117,209.17 = 54,098.91/x
  3. Step 3: Cross multiply
    78,138.29x = 117,209.17 × 54,098.91
  4. Step 4: Simplify right side
    78,138.29x = 6,340,888,203.76
  5. Step 5: Solve for x
    x = 6,340,888,203.76/78,138.29
  6. Step 6: Final answer
    x = 81,149.56

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1.5x scale

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.