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Finding the Fourth Proportional to 66,212.80, 99,254.40 and 26,717.20

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Solution

The fourth proportional to 66,212.80, 99,254.40 and 26,717.20 is: 40,049.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,212.80 : 99,254.40 = 26,717.20 : x
  2. Step 2: Convert to fraction form
    66,212.80/99,254.40 = 26,717.20/x
  3. Step 3: Cross multiply
    66,212.80x = 99,254.40 × 26,717.20
  4. Step 4: Simplify right side
    66,212.80x = 2,651,799,655.68
  5. Step 5: Solve for x
    x = 2,651,799,655.68/66,212.80
  6. Step 6: Final answer
    x = 40,049.65

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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.