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Finding the Fourth Proportional to 66,691.22, 100,049.15 and 21,110.40

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Solution

The fourth proportional to 66,691.22, 100,049.15 and 21,110.40 is: 31,669.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,691.22 : 100,049.15 = 21,110.40 : x
  2. Step 2: Convert to fraction form
    66,691.22/100,049.15 = 21,110.40/x
  3. Step 3: Cross multiply
    66,691.22x = 100,049.15 × 21,110.40
  4. Step 4: Simplify right side
    66,691.22x = 2,112,077,253.75
  5. Step 5: Solve for x
    x = 2,112,077,253.75/66,691.22
  6. Step 6: Final answer
    x = 31,669.49

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1.5x scale

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.