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Finding the Fourth Proportional to 71,447.47, 107,171.25 and 18,143.45

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Solution

The fourth proportional to 71,447.47, 107,171.25 and 18,143.45 is: 27,215.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,447.47 : 107,171.25 = 18,143.45 : x
  2. Step 2: Convert to fraction form
    71,447.47/107,171.25 = 18,143.45/x
  3. Step 3: Cross multiply
    71,447.47x = 107,171.25 × 18,143.45
  4. Step 4: Simplify right side
    71,447.47x = 1,944,455,839.96
  5. Step 5: Solve for x
    x = 1,944,455,839.96/71,447.47
  6. Step 6: Final answer
    x = 27,215.18

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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.