Home / 138,402.08-191,003.49-80,270.63

Finding the Fourth Proportional to 138,402.08, 191,003.49 and 80,270.63

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Solution

The fourth proportional to 138,402.08, 191,003.49 and 80,270.63 is: 110,778.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,402.08 : 191,003.49 = 80,270.63 : x
  2. Step 2: Convert to fraction form
    138,402.08/191,003.49 = 80,270.63/x
  3. Step 3: Cross multiply
    138,402.08x = 191,003.49 × 80,270.63
  4. Step 4: Simplify right side
    138,402.08x = 15,331,969,519.48
  5. Step 5: Solve for x
    x = 15,331,969,519.48/138,402.08
  6. Step 6: Final answer
    x = 110,778.47

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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.