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Finding the Fourth Proportional to 317,806.96, 476,710.20 and 81,149.68

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Solution

The fourth proportional to 317,806.96, 476,710.20 and 81,149.68 is: 121,724.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,806.96 : 476,710.20 = 81,149.68 : x
  2. Step 2: Convert to fraction form
    317,806.96/476,710.20 = 81,149.68/x
  3. Step 3: Cross multiply
    317,806.96x = 476,710.20 × 81,149.68
  4. Step 4: Simplify right side
    317,806.96x = 38,684,880,182.74
  5. Step 5: Solve for x
    x = 38,684,880,182.74/317,806.96
  6. Step 6: Final answer
    x = 121,724.46

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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.