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Finding the Fourth Proportional to 316,920.48, 475,370.96 and 129,791.04

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Solution

The fourth proportional to 316,920.48, 475,370.96 and 129,791.04 is: 194,682.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,920.48 : 475,370.96 = 129,791.04 : x
  2. Step 2: Convert to fraction form
    316,920.48/475,370.96 = 129,791.04/x
  3. Step 3: Cross multiply
    316,920.48x = 475,370.96 × 129,791.04
  4. Step 4: Simplify right side
    316,920.48x = 61,698,891,284.20
  5. Step 5: Solve for x
    x = 61,698,891,284.20/316,920.48
  6. Step 6: Final answer
    x = 194,682.56

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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.