Home / 138,430.20-207,645.30-103,438.20

Finding the Fourth Proportional to 138,430.20, 207,645.30 and 103,438.20

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Solution

The fourth proportional to 138,430.20, 207,645.30 and 103,438.20 is: 155,157.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,430.20 : 207,645.30 = 103,438.20 : x
  2. Step 2: Convert to fraction form
    138,430.20/207,645.30 = 103,438.20/x
  3. Step 3: Cross multiply
    138,430.20x = 207,645.30 × 103,438.20
  4. Step 4: Simplify right side
    138,430.20x = 21,478,456,070.46
  5. Step 5: Solve for x
    x = 21,478,456,070.46/138,430.20
  6. Step 6: Final answer
    x = 155,157.30

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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.