Home / 138,422.20-207,633.30-103,430.20

Finding the Fourth Proportional to 138,422.20, 207,633.30 and 103,430.20

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Solution

The fourth proportional to 138,422.20, 207,633.30 and 103,430.20 is: 155,145.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,422.20 : 207,633.30 = 103,430.20 : x
  2. Step 2: Convert to fraction form
    138,422.20/207,633.30 = 103,430.20/x
  3. Step 3: Cross multiply
    138,422.20x = 207,633.30 × 103,430.20
  4. Step 4: Simplify right side
    138,422.20x = 21,475,553,745.66
  5. Step 5: Solve for x
    x = 21,475,553,745.66/138,422.20
  6. Step 6: Final answer
    x = 155,145.30

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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.