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Finding the Fourth Proportional to 100,876.90, 151,278.90 and 40,880.20

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Solution

The fourth proportional to 100,876.90, 151,278.90 and 40,880.20 is: 61,305.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,876.90 : 151,278.90 = 40,880.20 : x
  2. Step 2: Convert to fraction form
    100,876.90/151,278.90 = 40,880.20/x
  3. Step 3: Cross multiply
    100,876.90x = 151,278.90 × 40,880.20
  4. Step 4: Simplify right side
    100,876.90x = 6,184,311,687.78
  5. Step 5: Solve for x
    x = 6,184,311,687.78/100,876.90
  6. Step 6: Final answer
    x = 61,305.53

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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.