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Finding the Fourth Proportional to 66,722.82, 92,061.99 and 39,874.02

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Solution

The fourth proportional to 66,722.82, 92,061.99 and 39,874.02 is: 55,016.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,722.82 : 92,061.99 = 39,874.02 : x
  2. Step 2: Convert to fraction form
    66,722.82/92,061.99 = 39,874.02/x
  3. Step 3: Cross multiply
    66,722.82x = 92,061.99 × 39,874.02
  4. Step 4: Simplify right side
    66,722.82x = 3,670,881,630.50
  5. Step 5: Solve for x
    x = 3,670,881,630.50/66,722.82
  6. Step 6: Final answer
    x = 55,016.88

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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.