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Finding the Fourth Proportional to 66,418.41, 99,642.18 and 19,674.93

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Solution

The fourth proportional to 66,418.41, 99,642.18 and 19,674.93 is: 29,516.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,418.41 : 99,642.18 = 19,674.93 : x
  2. Step 2: Convert to fraction form
    66,418.41/99,642.18 = 19,674.93/x
  3. Step 3: Cross multiply
    66,418.41x = 99,642.18 × 19,674.93
  4. Step 4: Simplify right side
    66,418.41x = 1,960,452,916.55
  5. Step 5: Solve for x
    x = 1,960,452,916.55/66,418.41
  6. Step 6: Final answer
    x = 29,516.71

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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.