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Finding the Fourth Proportional to 81,646.85, 112,684.95 and 49,834.24

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Solution

The fourth proportional to 81,646.85, 112,684.95 and 49,834.24 is: 68,778.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,646.85 : 112,684.95 = 49,834.24 : x
  2. Step 2: Convert to fraction form
    81,646.85/112,684.95 = 49,834.24/x
  3. Step 3: Cross multiply
    81,646.85x = 112,684.95 × 49,834.24
  4. Step 4: Simplify right side
    81,646.85x = 5,615,568,842.69
  5. Step 5: Solve for x
    x = 5,615,568,842.69/81,646.85
  6. Step 6: Final answer
    x = 68,778.76

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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.