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Finding the Fourth Proportional to 317,963.70, 476,945.55 and 81,324.90

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Solution

The fourth proportional to 317,963.70, 476,945.55 and 81,324.90 is: 121,987.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,963.70 : 476,945.55 = 81,324.90 : x
  2. Step 2: Convert to fraction form
    317,963.70/476,945.55 = 81,324.90/x
  3. Step 3: Cross multiply
    317,963.70x = 476,945.55 × 81,324.90
  4. Step 4: Simplify right side
    317,963.70x = 38,787,549,159.20
  5. Step 5: Solve for x
    x = 38,787,549,159.20/317,963.70
  6. Step 6: Final answer
    x = 121,987.35

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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.