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Finding the Fourth Proportional to 207,244.80, 310,867.20 and 74,129.40

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Solution

The fourth proportional to 207,244.80, 310,867.20 and 74,129.40 is: 111,194.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    207,244.80 : 310,867.20 = 74,129.40 : x
  2. Step 2: Convert to fraction form
    207,244.80/310,867.20 = 74,129.40/x
  3. Step 3: Cross multiply
    207,244.80x = 310,867.20 × 74,129.40
  4. Step 4: Simplify right side
    207,244.80x = 23,044,399,015.68
  5. Step 5: Solve for x
    x = 23,044,399,015.68/207,244.80
  6. Step 6: Final answer
    x = 111,194.10

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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.