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Finding the Fourth Proportional to 198,482.40, 297,723.60 and 86,216.40

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Solution

The fourth proportional to 198,482.40, 297,723.60 and 86,216.40 is: 129,324.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,482.40 : 297,723.60 = 86,216.40 : x
  2. Step 2: Convert to fraction form
    198,482.40/297,723.60 = 86,216.40/x
  3. Step 3: Cross multiply
    198,482.40x = 297,723.60 × 86,216.40
  4. Step 4: Simplify right side
    198,482.40x = 25,668,656,987.04
  5. Step 5: Solve for x
    x = 25,668,656,987.04/198,482.40
  6. Step 6: Final answer
    x = 129,324.60

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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.