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Finding the Fourth Proportional to 66,908.90, 100,363.35 and 40,621.70

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Solution

The fourth proportional to 66,908.90, 100,363.35 and 40,621.70 is: 60,932.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,908.90 : 100,363.35 = 40,621.70 : x
  2. Step 2: Convert to fraction form
    66,908.90/100,363.35 = 40,621.70/x
  3. Step 3: Cross multiply
    66,908.90x = 100,363.35 × 40,621.70
  4. Step 4: Simplify right side
    66,908.90x = 4,076,929,894.70
  5. Step 5: Solve for x
    x = 4,076,929,894.70/66,908.90
  6. Step 6: Final answer
    x = 60,932.55

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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.