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Finding the Fourth Proportional to 156,939.60, 235,020.60 and 100,693.20

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Solution

The fourth proportional to 156,939.60, 235,020.60 and 100,693.20 is: 150,790.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,939.60 : 235,020.60 = 100,693.20 : x
  2. Step 2: Convert to fraction form
    156,939.60/235,020.60 = 100,693.20/x
  3. Step 3: Cross multiply
    156,939.60x = 235,020.60 × 100,693.20
  4. Step 4: Simplify right side
    156,939.60x = 23,664,976,279.92
  5. Step 5: Solve for x
    x = 23,664,976,279.92/156,939.60
  6. Step 6: Final answer
    x = 150,790.34

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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.