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Finding the Fourth Proportional to 73,108.80, 100,890.45 and 39,574.80

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Solution

The fourth proportional to 73,108.80, 100,890.45 and 39,574.80 is: 54,613.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,108.80 : 100,890.45 = 39,574.80 : x
  2. Step 2: Convert to fraction form
    73,108.80/100,890.45 = 39,574.80/x
  3. Step 3: Cross multiply
    73,108.80x = 100,890.45 × 39,574.80
  4. Step 4: Simplify right side
    73,108.80x = 3,992,719,380.66
  5. Step 5: Solve for x
    x = 3,992,719,380.66/73,108.80
  6. Step 6: Final answer
    x = 54,613.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.