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Finding the Fourth Proportional to 66,267.20, 99,400.80 and 17,019.20

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Solution

The fourth proportional to 66,267.20, 99,400.80 and 17,019.20 is: 25,528.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,267.20 : 99,400.80 = 17,019.20 : x
  2. Step 2: Convert to fraction form
    66,267.20/99,400.80 = 17,019.20/x
  3. Step 3: Cross multiply
    66,267.20x = 99,400.80 × 17,019.20
  4. Step 4: Simplify right side
    66,267.20x = 1,691,722,095.36
  5. Step 5: Solve for x
    x = 1,691,722,095.36/66,267.20
  6. Step 6: Final answer
    x = 25,528.80

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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.