Home / 156,974.15-216,618.40-85,351.70

Finding the Fourth Proportional to 156,974.15, 216,618.40 and 85,351.70

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Solution

The fourth proportional to 156,974.15, 216,618.40 and 85,351.70 is: 117,782.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,974.15 : 216,618.40 = 85,351.70 : x
  2. Step 2: Convert to fraction form
    156,974.15/216,618.40 = 85,351.70/x
  3. Step 3: Cross multiply
    156,974.15x = 216,618.40 × 85,351.70
  4. Step 4: Simplify right side
    156,974.15x = 18,488,748,691.28
  5. Step 5: Solve for x
    x = 18,488,748,691.28/156,974.15
  6. Step 6: Final answer
    x = 117,782.12

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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.