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Finding the Fourth Proportional to 132,345.80, 198,518.70 and 79,857.80

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Solution

The fourth proportional to 132,345.80, 198,518.70 and 79,857.80 is: 119,786.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,345.80 : 198,518.70 = 79,857.80 : x
  2. Step 2: Convert to fraction form
    132,345.80/198,518.70 = 79,857.80/x
  3. Step 3: Cross multiply
    132,345.80x = 198,518.70 × 79,857.80
  4. Step 4: Simplify right side
    132,345.80x = 15,853,266,640.86
  5. Step 5: Solve for x
    x = 15,853,266,640.86/132,345.80
  6. Step 6: Final answer
    x = 119,786.70

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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.