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Finding the Fourth Proportional to 66,911.90, 100,282.80 and 27,424.40

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Solution

The fourth proportional to 66,911.90, 100,282.80 and 27,424.40 is: 41,101.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,911.90 : 100,282.80 = 27,424.40 : x
  2. Step 2: Convert to fraction form
    66,911.90/100,282.80 = 27,424.40/x
  3. Step 3: Cross multiply
    66,911.90x = 100,282.80 × 27,424.40
  4. Step 4: Simplify right side
    66,911.90x = 2,750,195,620.32
  5. Step 5: Solve for x
    x = 2,750,195,620.32/66,911.90
  6. Step 6: Final answer
    x = 41,101.74

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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.