Home / 84,655.14-126,981.42-20,613.89

Finding the Fourth Proportional to 84,655.14, 126,981.42 and 20,613.89

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Solution

The fourth proportional to 84,655.14, 126,981.42 and 20,613.89 is: 30,920.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,655.14 : 126,981.42 = 20,613.89 : x
  2. Step 2: Convert to fraction form
    84,655.14/126,981.42 = 20,613.89/x
  3. Step 3: Cross multiply
    84,655.14x = 126,981.42 × 20,613.89
  4. Step 4: Simplify right side
    84,655.14x = 2,617,580,440.55
  5. Step 5: Solve for x
    x = 2,617,580,440.55/84,655.14
  6. Step 6: Final answer
    x = 30,920.51

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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.