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Finding the Fourth Proportional to 126,660.80, 189,991.20 and 52,779.20

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Solution

The fourth proportional to 126,660.80, 189,991.20 and 52,779.20 is: 79,168.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,660.80 : 189,991.20 = 52,779.20 : x
  2. Step 2: Convert to fraction form
    126,660.80/189,991.20 = 52,779.20/x
  3. Step 3: Cross multiply
    126,660.80x = 189,991.20 × 52,779.20
  4. Step 4: Simplify right side
    126,660.80x = 10,027,583,543.04
  5. Step 5: Solve for x
    x = 10,027,583,543.04/126,660.80
  6. Step 6: Final answer
    x = 79,168.80

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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.