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Finding the Fourth Proportional to 29,163.60, 43,723.80 and 19,780.20

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Solution

The fourth proportional to 29,163.60, 43,723.80 and 19,780.20 is: 29,655.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    29,163.60 : 43,723.80 = 19,780.20 : x
  2. Step 2: Convert to fraction form
    29,163.60/43,723.80 = 19,780.20/x
  3. Step 3: Cross multiply
    29,163.60x = 43,723.80 × 19,780.20
  4. Step 4: Simplify right side
    29,163.60x = 864,865,508.76
  5. Step 5: Solve for x
    x = 864,865,508.76/29,163.60
  6. Step 6: Final answer
    x = 29,655.65

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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.