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Finding the Fourth Proportional to 66,943.88, 100,415.84 and 25,390.88

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Solution

The fourth proportional to 66,943.88, 100,415.84 and 25,390.88 is: 38,086.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,943.88 : 100,415.84 = 25,390.88 : x
  2. Step 2: Convert to fraction form
    66,943.88/100,415.84 = 25,390.88/x
  3. Step 3: Cross multiply
    66,943.88x = 100,415.84 × 25,390.88
  4. Step 4: Simplify right side
    66,943.88x = 2,549,646,543.54
  5. Step 5: Solve for x
    x = 2,549,646,543.54/66,943.88
  6. Step 6: Final answer
    x = 38,086.33

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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.