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Finding the Fourth Proportional to 66,940.88, 100,411.34 and 25,387.88

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Solution

The fourth proportional to 66,940.88, 100,411.34 and 25,387.88 is: 38,081.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,940.88 : 100,411.34 = 25,387.88 : x
  2. Step 2: Convert to fraction form
    66,940.88/100,411.34 = 25,387.88/x
  3. Step 3: Cross multiply
    66,940.88x = 100,411.34 × 25,387.88
  4. Step 4: Simplify right side
    66,940.88x = 2,549,230,421.56
  5. Step 5: Solve for x
    x = 2,549,230,421.56/66,940.88
  6. Step 6: Final answer
    x = 38,081.82

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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.