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Finding the Fourth Proportional to 83,213.20, 124,819.80 and 70,042.60

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Solution

The fourth proportional to 83,213.20, 124,819.80 and 70,042.60 is: 105,063.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,213.20 : 124,819.80 = 70,042.60 : x
  2. Step 2: Convert to fraction form
    83,213.20/124,819.80 = 70,042.60/x
  3. Step 3: Cross multiply
    83,213.20x = 124,819.80 × 70,042.60
  4. Step 4: Simplify right side
    83,213.20x = 8,742,703,323.48
  5. Step 5: Solve for x
    x = 8,742,703,323.48/83,213.20
  6. Step 6: Final answer
    x = 105,063.90

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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.