Home / 84,934.78-127,385.43-80,719.90

Finding the Fourth Proportional to 84,934.78, 127,385.43 and 80,719.90

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Solution

The fourth proportional to 84,934.78, 127,385.43 and 80,719.90 is: 121,063.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,934.78 : 127,385.43 = 80,719.90 : x
  2. Step 2: Convert to fraction form
    84,934.78/127,385.43 = 80,719.90/x
  3. Step 3: Cross multiply
    84,934.78x = 127,385.43 × 80,719.90
  4. Step 4: Simplify right side
    84,934.78x = 10,282,539,171.06
  5. Step 5: Solve for x
    x = 10,282,539,171.06/84,934.78
  6. Step 6: Final answer
    x = 121,063.94

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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.