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Finding the Fourth Proportional to 230,013.80, 345,020.70 and 72,258.20

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Solution

The fourth proportional to 230,013.80, 345,020.70 and 72,258.20 is: 108,387.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    230,013.80 : 345,020.70 = 72,258.20 : x
  2. Step 2: Convert to fraction form
    230,013.80/345,020.70 = 72,258.20/x
  3. Step 3: Cross multiply
    230,013.80x = 345,020.70 × 72,258.20
  4. Step 4: Simplify right side
    230,013.80x = 24,930,574,744.74
  5. Step 5: Solve for x
    x = 24,930,574,744.74/230,013.80
  6. Step 6: Final answer
    x = 108,387.30

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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.