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Finding the Fourth Proportional to 132,131, 182,340.78 and 79,139

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Solution

The fourth proportional to 132,131, 182,340.78 and 79,139 is: 109,211.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,131 : 182,340.78 = 79,139 : x
  2. Step 2: Convert to fraction form
    132,131/182,340.78 = 79,139/x
  3. Step 3: Cross multiply
    132,131x = 182,340.78 × 79,139
  4. Step 4: Simplify right side
    132,131x = 14,430,266,988.42
  5. Step 5: Solve for x
    x = 14,430,266,988.42/132,131
  6. Step 6: Final answer
    x = 109,211.82

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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.