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Finding the Fourth Proportional to 317,758.18, 476,636.85 and 81,100.87

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Solution

The fourth proportional to 317,758.18, 476,636.85 and 81,100.87 is: 121,651.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,758.18 : 476,636.85 = 81,100.87 : x
  2. Step 2: Convert to fraction form
    317,758.18/476,636.85 = 81,100.87/x
  3. Step 3: Cross multiply
    317,758.18x = 476,636.85 × 81,100.87
  4. Step 4: Simplify right side
    317,758.18x = 38,655,663,209.06
  5. Step 5: Solve for x
    x = 38,655,663,209.06/317,758.18
  6. Step 6: Final answer
    x = 121,651.20

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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.