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Finding the Fourth Proportional to 91,380.42, 126,120.42 and 53,162.10

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Solution

The fourth proportional to 91,380.42, 126,120.42 and 53,162.10 is: 73,372.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,380.42 : 126,120.42 = 53,162.10 : x
  2. Step 2: Convert to fraction form
    91,380.42/126,120.42 = 53,162.10/x
  3. Step 3: Cross multiply
    91,380.42x = 126,120.42 × 53,162.10
  4. Step 4: Simplify right side
    91,380.42x = 6,704,826,380.08
  5. Step 5: Solve for x
    x = 6,704,826,380.08/91,380.42
  6. Step 6: Final answer
    x = 73,372.68

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.