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Finding the Fourth Proportional to 66,963.18, 100,392.11 and 45,839.19

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Solution

The fourth proportional to 66,963.18, 100,392.11 and 45,839.19 is: 68,722.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,963.18 : 100,392.11 = 45,839.19 : x
  2. Step 2: Convert to fraction form
    66,963.18/100,392.11 = 45,839.19/x
  3. Step 3: Cross multiply
    66,963.18x = 100,392.11 × 45,839.19
  4. Step 4: Simplify right side
    66,963.18x = 4,601,893,041.61
  5. Step 5: Solve for x
    x = 4,601,893,041.61/66,963.18
  6. Step 6: Final answer
    x = 68,722.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.