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Finding the Fourth Proportional to 138,975.20, 208,462.80 and 124,200.80

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Solution

The fourth proportional to 138,975.20, 208,462.80 and 124,200.80 is: 186,301.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,975.20 : 208,462.80 = 124,200.80 : x
  2. Step 2: Convert to fraction form
    138,975.20/208,462.80 = 124,200.80/x
  3. Step 3: Cross multiply
    138,975.20x = 208,462.80 × 124,200.80
  4. Step 4: Simplify right side
    138,975.20x = 25,891,246,530.24
  5. Step 5: Solve for x
    x = 25,891,246,530.24/138,975.20
  6. Step 6: Final answer
    x = 186,301.20

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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.