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Finding the Fourth Proportional to 84,863.49, 127,278.82 and 80,648.65

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Solution

The fourth proportional to 84,863.49, 127,278.82 and 80,648.65 is: 120,957.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,863.49 : 127,278.82 = 80,648.65 : x
  2. Step 2: Convert to fraction form
    84,863.49/127,278.82 = 80,648.65/x
  3. Step 3: Cross multiply
    84,863.49x = 127,278.82 × 80,648.65
  4. Step 4: Simplify right side
    84,863.49x = 10,264,865,006.59
  5. Step 5: Solve for x
    x = 10,264,865,006.59/84,863.49
  6. Step 6: Final answer
    x = 120,957.38

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1.5x scale

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.