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Finding the Fourth Proportional to 126,307.59, 189,461.61 and 84,269.80

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Solution

The fourth proportional to 126,307.59, 189,461.61 and 84,269.80 is: 126,404.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,307.59 : 189,461.61 = 84,269.80 : x
  2. Step 2: Convert to fraction form
    126,307.59/189,461.61 = 84,269.80/x
  3. Step 3: Cross multiply
    126,307.59x = 189,461.61 × 84,269.80
  4. Step 4: Simplify right side
    126,307.59x = 15,965,891,982.38
  5. Step 5: Solve for x
    x = 15,965,891,982.38/126,307.59
  6. Step 6: Final answer
    x = 126,404.85

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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.