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Finding the Fourth Proportional to 84,592.62, 126,856.10 and 45,128.20

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Solution

The fourth proportional to 84,592.62, 126,856.10 and 45,128.20 is: 67,674.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,592.62 : 126,856.10 = 45,128.20 : x
  2. Step 2: Convert to fraction form
    84,592.62/126,856.10 = 45,128.20/x
  3. Step 3: Cross multiply
    84,592.62x = 126,856.10 × 45,128.20
  4. Step 4: Simplify right side
    84,592.62x = 5,724,787,452.02
  5. Step 5: Solve for x
    x = 5,724,787,452.02/84,592.62
  6. Step 6: Final answer
    x = 67,674.79

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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.