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Finding the Fourth Proportional to 84,715.30, 126,986.55 and 49,636.90

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Solution

The fourth proportional to 84,715.30, 126,986.55 and 49,636.90 is: 74,404.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,715.30 : 126,986.55 = 49,636.90 : x
  2. Step 2: Convert to fraction form
    84,715.30/126,986.55 = 49,636.90/x
  3. Step 3: Cross multiply
    84,715.30x = 126,986.55 × 49,636.90
  4. Step 4: Simplify right side
    84,715.30x = 6,303,218,683.70
  5. Step 5: Solve for x
    x = 6,303,218,683.70/84,715.30
  6. Step 6: Final answer
    x = 74,404.73

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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.