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Finding the Fourth Proportional to 138,405.52, 191,000.04 and 80,273.52

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Solution

The fourth proportional to 138,405.52, 191,000.04 and 80,273.52 is: 110,777.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,405.52 : 191,000.04 = 80,273.52 : x
  2. Step 2: Convert to fraction form
    138,405.52/191,000.04 = 80,273.52/x
  3. Step 3: Cross multiply
    138,405.52x = 191,000.04 × 80,273.52
  4. Step 4: Simplify right side
    138,405.52x = 15,332,245,530.94
  5. Step 5: Solve for x
    x = 15,332,245,530.94/138,405.52
  6. Step 6: Final answer
    x = 110,777.70

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1.5x scale

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.