Home / 83,613.48-115,105.23-72,438.18

Finding the Fourth Proportional to 83,613.48, 115,105.23 and 72,438.18

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Solution

The fourth proportional to 83,613.48, 115,105.23 and 72,438.18 is: 99,720.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,613.48 : 115,105.23 = 72,438.18 : x
  2. Step 2: Convert to fraction form
    83,613.48/115,105.23 = 72,438.18/x
  3. Step 3: Cross multiply
    83,613.48x = 115,105.23 × 72,438.18
  4. Step 4: Simplify right side
    83,613.48x = 8,338,013,369.68
  5. Step 5: Solve for x
    x = 8,338,013,369.68/83,613.48
  6. Step 6: Final answer
    x = 99,720.92

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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.