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Finding the Fourth Proportional to 84,378.70, 126,568.17 and 34,458.80

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Solution

The fourth proportional to 84,378.70, 126,568.17 and 34,458.80 is: 51,688.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,378.70 : 126,568.17 = 34,458.80 : x
  2. Step 2: Convert to fraction form
    84,378.70/126,568.17 = 34,458.80/x
  3. Step 3: Cross multiply
    84,378.70x = 126,568.17 × 34,458.80
  4. Step 4: Simplify right side
    84,378.70x = 4,361,386,526.64
  5. Step 5: Solve for x
    x = 4,361,386,526.64/84,378.70
  6. Step 6: Final answer
    x = 51,688.24

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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.