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Finding the Fourth Proportional to 76,613.70, 114,920.55 and 20,453.70

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Solution

The fourth proportional to 76,613.70, 114,920.55 and 20,453.70 is: 30,680.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,613.70 : 114,920.55 = 20,453.70 : x
  2. Step 2: Convert to fraction form
    76,613.70/114,920.55 = 20,453.70/x
  3. Step 3: Cross multiply
    76,613.70x = 114,920.55 × 20,453.70
  4. Step 4: Simplify right side
    76,613.70x = 2,350,550,453.54
  5. Step 5: Solve for x
    x = 2,350,550,453.54/76,613.70
  6. Step 6: Final answer
    x = 30,680.55

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1.5x scale

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.