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Finding the Fourth Proportional to 66,172.68, 99,275.34 and 19,425.56

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Solution

The fourth proportional to 66,172.68, 99,275.34 and 19,425.56 is: 29,143.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,172.68 : 99,275.34 = 19,425.56 : x
  2. Step 2: Convert to fraction form
    66,172.68/99,275.34 = 19,425.56/x
  3. Step 3: Cross multiply
    66,172.68x = 99,275.34 × 19,425.56
  4. Step 4: Simplify right side
    66,172.68x = 1,928,479,073.69
  5. Step 5: Solve for x
    x = 1,928,479,073.69/66,172.68
  6. Step 6: Final answer
    x = 29,143.13

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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.