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Finding the Fourth Proportional to 66,531.36, 99,744.04 and 38,419.56

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Solution

The fourth proportional to 66,531.36, 99,744.04 and 38,419.56 is: 57,598.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,531.36 : 99,744.04 = 38,419.56 : x
  2. Step 2: Convert to fraction form
    66,531.36/99,744.04 = 38,419.56/x
  3. Step 3: Cross multiply
    66,531.36x = 99,744.04 × 38,419.56
  4. Step 4: Simplify right side
    66,531.36x = 3,832,122,129.42
  5. Step 5: Solve for x
    x = 3,832,122,129.42/66,531.36
  6. Step 6: Final answer
    x = 57,598.73

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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.