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Finding the Fourth Proportional to 66,363.56, 91,578.54 and 36,148.72

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Solution

The fourth proportional to 66,363.56, 91,578.54 and 36,148.72 is: 49,883.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,363.56 : 91,578.54 = 36,148.72 : x
  2. Step 2: Convert to fraction form
    66,363.56/91,578.54 = 36,148.72/x
  3. Step 3: Cross multiply
    66,363.56x = 91,578.54 × 36,148.72
  4. Step 4: Simplify right side
    66,363.56x = 3,310,447,000.47
  5. Step 5: Solve for x
    x = 3,310,447,000.47/66,363.56
  6. Step 6: Final answer
    x = 49,883.51

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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.