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Finding the Fourth Proportional to 317,766.60, 476,649.36 and 81,109.20

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Solution

The fourth proportional to 317,766.60, 476,649.36 and 81,109.20 is: 121,663.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,766.60 : 476,649.36 = 81,109.20 : x
  2. Step 2: Convert to fraction form
    317,766.60/476,649.36 = 81,109.20/x
  3. Step 3: Cross multiply
    317,766.60x = 476,649.36 × 81,109.20
  4. Step 4: Simplify right side
    317,766.60x = 38,660,648,270.11
  5. Step 5: Solve for x
    x = 38,660,648,270.11/317,766.60
  6. Step 6: Final answer
    x = 121,663.66

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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.