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Finding the Fourth Proportional to 84,882.78, 127,307.70 and 80,667.90

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Solution

The fourth proportional to 84,882.78, 127,307.70 and 80,667.90 is: 120,986.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,882.78 : 127,307.70 = 80,667.90 : x
  2. Step 2: Convert to fraction form
    84,882.78/127,307.70 = 80,667.90/x
  3. Step 3: Cross multiply
    84,882.78x = 127,307.70 × 80,667.90
  4. Step 4: Simplify right side
    84,882.78x = 10,269,644,812.83
  5. Step 5: Solve for x
    x = 10,269,644,812.83/84,882.78
  6. Step 6: Final answer
    x = 120,986.20

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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.