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Finding the Fourth Proportional to 90,445.80, 135,695.22 and 40,514.79

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Solution

The fourth proportional to 90,445.80, 135,695.22 and 40,514.79 is: 60,784.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,445.80 : 135,695.22 = 40,514.79 : x
  2. Step 2: Convert to fraction form
    90,445.80/135,695.22 = 40,514.79/x
  3. Step 3: Cross multiply
    90,445.80x = 135,695.22 × 40,514.79
  4. Step 4: Simplify right side
    90,445.80x = 5,497,662,663.83
  5. Step 5: Solve for x
    x = 5,497,662,663.83/90,445.80
  6. Step 6: Final answer
    x = 60,784.06

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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.