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Finding the Fourth Proportional to 66,282.72, 91,471.84 and 36,069.68

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Solution

The fourth proportional to 66,282.72, 91,471.84 and 36,069.68 is: 49,777.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,282.72 : 91,471.84 = 36,069.68 : x
  2. Step 2: Convert to fraction form
    66,282.72/91,471.84 = 36,069.68/x
  3. Step 3: Cross multiply
    66,282.72x = 91,471.84 × 36,069.68
  4. Step 4: Simplify right side
    66,282.72x = 3,299,359,997.81
  5. Step 5: Solve for x
    x = 3,299,359,997.81/66,282.72
  6. Step 6: Final answer
    x = 49,777.08

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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.