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Finding the Fourth Proportional to 66,690.96, 100,064.52 and 29,231.70

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Solution

The fourth proportional to 66,690.96, 100,064.52 and 29,231.70 is: 43,859.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,690.96 : 100,064.52 = 29,231.70 : x
  2. Step 2: Convert to fraction form
    66,690.96/100,064.52 = 29,231.70/x
  3. Step 3: Cross multiply
    66,690.96x = 100,064.52 × 29,231.70
  4. Step 4: Simplify right side
    66,690.96x = 2,925,056,029.28
  5. Step 5: Solve for x
    x = 2,925,056,029.28/66,690.96
  6. Step 6: Final answer
    x = 43,859.86

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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.