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Finding the Fourth Proportional to 86,760.60, 130,335.30 and 83,218.20

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Solution

The fourth proportional to 86,760.60, 130,335.30 and 83,218.20 is: 125,013.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    86,760.60 : 130,335.30 = 83,218.20 : x
  2. Step 2: Convert to fraction form
    86,760.60/130,335.30 = 83,218.20/x
  3. Step 3: Cross multiply
    86,760.60x = 130,335.30 × 83,218.20
  4. Step 4: Simplify right side
    86,760.60x = 10,846,269,062.46
  5. Step 5: Solve for x
    x = 10,846,269,062.46/86,760.60
  6. Step 6: Final answer
    x = 125,013.76

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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.