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Finding the Fourth Proportional to 66,722.84, 92,138.74 and 42,891.02

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Solution

The fourth proportional to 66,722.84, 92,138.74 and 42,891.02 is: 59,228.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,722.84 : 92,138.74 = 42,891.02 : x
  2. Step 2: Convert to fraction form
    66,722.84/92,138.74 = 42,891.02/x
  3. Step 3: Cross multiply
    66,722.84x = 92,138.74 × 42,891.02
  4. Step 4: Simplify right side
    66,722.84x = 3,951,924,540.11
  5. Step 5: Solve for x
    x = 3,951,924,540.11/66,722.84
  6. Step 6: Final answer
    x = 59,228.96

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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.