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Finding the Fourth Proportional to 80,829.68, 111,548.42 and 45,019.70

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Solution

The fourth proportional to 80,829.68, 111,548.42 and 45,019.70 is: 62,129.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,829.68 : 111,548.42 = 45,019.70 : x
  2. Step 2: Convert to fraction form
    80,829.68/111,548.42 = 45,019.70/x
  3. Step 3: Cross multiply
    80,829.68x = 111,548.42 × 45,019.70
  4. Step 4: Simplify right side
    80,829.68x = 5,021,876,403.87
  5. Step 5: Solve for x
    x = 5,021,876,403.87/80,829.68
  6. Step 6: Final answer
    x = 62,129.11

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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.