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Finding the Fourth Proportional to 66,393.18, 91,621.42 and 36,178.72

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Solution

The fourth proportional to 66,393.18, 91,621.42 and 36,178.72 is: 49,926.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,393.18 : 91,621.42 = 36,178.72 : x
  2. Step 2: Convert to fraction form
    66,393.18/91,621.42 = 36,178.72/x
  3. Step 3: Cross multiply
    66,393.18x = 91,621.42 × 36,178.72
  4. Step 4: Simplify right side
    66,393.18x = 3,314,745,700.18
  5. Step 5: Solve for x
    x = 3,314,745,700.18/66,393.18
  6. Step 6: Final answer
    x = 49,926.00

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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.