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Finding the Fourth Proportional to 66,407.71, 91,639.97 and 36,192.38

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Solution

The fourth proportional to 66,407.71, 91,639.97 and 36,192.38 is: 49,944.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,407.71 : 91,639.97 = 36,192.38 : x
  2. Step 2: Convert to fraction form
    66,407.71/91,639.97 = 36,192.38/x
  3. Step 3: Cross multiply
    66,407.71x = 91,639.97 × 36,192.38
  4. Step 4: Simplify right side
    66,407.71x = 3,316,668,665.57
  5. Step 5: Solve for x
    x = 3,316,668,665.57/66,407.71
  6. Step 6: Final answer
    x = 49,944.03

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.