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Finding the Fourth Proportional to 67,076.88, 100,630.88 and 19,690.08

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Solution

The fourth proportional to 67,076.88, 100,630.88 and 19,690.08 is: 29,539.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,076.88 : 100,630.88 = 19,690.08 : x
  2. Step 2: Convert to fraction form
    67,076.88/100,630.88 = 19,690.08/x
  3. Step 3: Cross multiply
    67,076.88x = 100,630.88 × 19,690.08
  4. Step 4: Simplify right side
    67,076.88x = 1,981,430,077.67
  5. Step 5: Solve for x
    x = 1,981,430,077.67/67,076.88
  6. Step 6: Final answer
    x = 29,539.69

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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.