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Finding the Fourth Proportional to 207,086.40, 310,629.60 and 132,436.80

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Solution

The fourth proportional to 207,086.40, 310,629.60 and 132,436.80 is: 198,655.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,086.40 : 310,629.60 = 132,436.80 : x
  2. Step 2: Convert to fraction form
    207,086.40/310,629.60 = 132,436.80/x
  3. Step 3: Cross multiply
    207,086.40x = 310,629.60 × 132,436.80
  4. Step 4: Simplify right side
    207,086.40x = 41,138,790,209.28
  5. Step 5: Solve for x
    x = 41,138,790,209.28/207,086.40
  6. Step 6: Final answer
    x = 198,655.20

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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.