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Finding the Fourth Proportional to 138,320.80, 207,481.20 and 130,010.20

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Solution

The fourth proportional to 138,320.80, 207,481.20 and 130,010.20 is: 195,015.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,320.80 : 207,481.20 = 130,010.20 : x
  2. Step 2: Convert to fraction form
    138,320.80/207,481.20 = 130,010.20/x
  3. Step 3: Cross multiply
    138,320.80x = 207,481.20 × 130,010.20
  4. Step 4: Simplify right side
    138,320.80x = 26,974,672,308.24
  5. Step 5: Solve for x
    x = 26,974,672,308.24/138,320.80
  6. Step 6: Final answer
    x = 195,015.30

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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.