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Finding the Fourth Proportional to 66,243.74, 91,417.53 and 36,029.72

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Solution

The fourth proportional to 66,243.74, 91,417.53 and 36,029.72 is: 49,721.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,243.74 : 91,417.53 = 36,029.72 : x
  2. Step 2: Convert to fraction form
    66,243.74/91,417.53 = 36,029.72/x
  3. Step 3: Cross multiply
    66,243.74x = 91,417.53 × 36,029.72
  4. Step 4: Simplify right side
    66,243.74x = 3,293,747,551.90
  5. Step 5: Solve for x
    x = 3,293,747,551.90/66,243.74
  6. Step 6: Final answer
    x = 49,721.65

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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.