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Finding the Fourth Proportional to 71,253.96, 106,872.74 and 18,667.55

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Solution

The fourth proportional to 71,253.96, 106,872.74 and 18,667.55 is: 27,999.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,253.96 : 106,872.74 = 18,667.55 : x
  2. Step 2: Convert to fraction form
    71,253.96/106,872.74 = 18,667.55/x
  3. Step 3: Cross multiply
    71,253.96x = 106,872.74 × 18,667.55
  4. Step 4: Simplify right side
    71,253.96x = 1,995,051,589.89
  5. Step 5: Solve for x
    x = 1,995,051,589.89/71,253.96
  6. Step 6: Final answer
    x = 27,999.17

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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.