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Finding the Fourth Proportional to 66,748.16, 100,125.48 and 55,039.88

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Solution

The fourth proportional to 66,748.16, 100,125.48 and 55,039.88 is: 82,562.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,748.16 : 100,125.48 = 55,039.88 : x
  2. Step 2: Convert to fraction form
    66,748.16/100,125.48 = 55,039.88/x
  3. Step 3: Cross multiply
    66,748.16x = 100,125.48 × 55,039.88
  4. Step 4: Simplify right side
    66,748.16x = 5,510,894,404.14
  5. Step 5: Solve for x
    x = 5,510,894,404.14/66,748.16
  6. Step 6: Final answer
    x = 82,562.49

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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.