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Finding the Fourth Proportional to 138,340.20, 207,510.30 and 103,348.20

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Solution

The fourth proportional to 138,340.20, 207,510.30 and 103,348.20 is: 155,022.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,340.20 : 207,510.30 = 103,348.20 : x
  2. Step 2: Convert to fraction form
    138,340.20/207,510.30 = 103,348.20/x
  3. Step 3: Cross multiply
    138,340.20x = 207,510.30 × 103,348.20
  4. Step 4: Simplify right side
    138,340.20x = 21,445,815,986.46
  5. Step 5: Solve for x
    x = 21,445,815,986.46/138,340.20
  6. Step 6: Final answer
    x = 155,022.30

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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.