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Finding the Fourth Proportional to 67,140, 100,731.96 and 20,392.92

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Solution

The fourth proportional to 67,140, 100,731.96 and 20,392.92 is: 30,596.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    67,140 : 100,731.96 = 20,392.92 : x
  2. Step 2: Convert to fraction form
    67,140/100,731.96 = 20,392.92/x
  3. Step 3: Cross multiply
    67,140x = 100,731.96 × 20,392.92
  4. Step 4: Simplify right side
    67,140x = 2,054,218,801.72
  5. Step 5: Solve for x
    x = 2,054,218,801.72/67,140
  6. Step 6: Final answer
    x = 30,596.05

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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.