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Finding the Fourth Proportional to 71,449.60, 107,172.24 and 18,859.36

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Solution

The fourth proportional to 71,449.60, 107,172.24 and 18,859.36 is: 28,288.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,449.60 : 107,172.24 = 18,859.36 : x
  2. Step 2: Convert to fraction form
    71,449.60/107,172.24 = 18,859.36/x
  3. Step 3: Cross multiply
    71,449.60x = 107,172.24 × 18,859.36
  4. Step 4: Simplify right side
    71,449.60x = 2,021,199,856.17
  5. Step 5: Solve for x
    x = 2,021,199,856.17/71,449.60
  6. Step 6: Final answer
    x = 28,288.47

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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.