Home / 84,939.78-127,392.93-80,724.90

Finding the Fourth Proportional to 84,939.78, 127,392.93 and 80,724.90

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Solution

The fourth proportional to 84,939.78, 127,392.93 and 80,724.90 is: 121,071.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    84,939.78 : 127,392.93 = 80,724.90 : x
  2. Step 2: Convert to fraction form
    84,939.78/127,392.93 = 80,724.90/x
  3. Step 3: Cross multiply
    84,939.78x = 127,392.93 × 80,724.90
  4. Step 4: Simplify right side
    84,939.78x = 10,283,781,534.96
  5. Step 5: Solve for x
    x = 10,283,781,534.96/84,939.78
  6. Step 6: Final answer
    x = 121,071.44

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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.