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Finding the Fourth Proportional to 67,116, 100,695.96 and 20,368.92

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Solution

The fourth proportional to 67,116, 100,695.96 and 20,368.92 is: 30,560.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,116 : 100,695.96 = 20,368.92 : x
  2. Step 2: Convert to fraction form
    67,116/100,695.96 = 20,368.92/x
  3. Step 3: Cross multiply
    67,116x = 100,695.96 × 20,368.92
  4. Step 4: Simplify right side
    67,116x = 2,051,067,953.56
  5. Step 5: Solve for x
    x = 2,051,067,953.56/67,116
  6. Step 6: Final answer
    x = 30,560.04

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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.