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Finding the Fourth Proportional to 66,621.72, 91,978.02 and 41,505.24

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Solution

The fourth proportional to 66,621.72, 91,978.02 and 41,505.24 is: 57,302.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,621.72 : 91,978.02 = 41,505.24 : x
  2. Step 2: Convert to fraction form
    66,621.72/91,978.02 = 41,505.24/x
  3. Step 3: Cross multiply
    66,621.72x = 91,978.02 × 41,505.24
  4. Step 4: Simplify right side
    66,621.72x = 3,817,569,794.82
  5. Step 5: Solve for x
    x = 3,817,569,794.82/66,621.72
  6. Step 6: Final answer
    x = 57,302.18

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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.