Home / 99,933.31-137,909.78-54,613.21

Finding the Fourth Proportional to 99,933.31, 137,909.78 and 54,613.21

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Solution

The fourth proportional to 99,933.31, 137,909.78 and 54,613.21 is: 75,367.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,933.31 : 137,909.78 = 54,613.21 : x
  2. Step 2: Convert to fraction form
    99,933.31/137,909.78 = 54,613.21/x
  3. Step 3: Cross multiply
    99,933.31x = 137,909.78 × 54,613.21
  4. Step 4: Simplify right side
    99,933.31x = 7,531,695,776.19
  5. Step 5: Solve for x
    x = 7,531,695,776.19/99,933.31
  6. Step 6: Final answer
    x = 75,367.22

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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.