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Finding the Fourth Proportional to 66,919.90, 100,294.80 and 27,432.40

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Solution

The fourth proportional to 66,919.90, 100,294.80 and 27,432.40 is: 41,113.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,919.90 : 100,294.80 = 27,432.40 : x
  2. Step 2: Convert to fraction form
    66,919.90/100,294.80 = 27,432.40/x
  3. Step 3: Cross multiply
    66,919.90x = 100,294.80 × 27,432.40
  4. Step 4: Simplify right side
    66,919.90x = 2,751,327,071.52
  5. Step 5: Solve for x
    x = 2,751,327,071.52/66,919.90
  6. Step 6: Final answer
    x = 41,113.74

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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.