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Finding the Fourth Proportional to 71,363.60, 107,036.94 and 18,777.20

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Solution

The fourth proportional to 71,363.60, 107,036.94 and 18,777.20 is: 28,163.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    71,363.60 : 107,036.94 = 18,777.20 : x
  2. Step 2: Convert to fraction form
    71,363.60/107,036.94 = 18,777.20/x
  3. Step 3: Cross multiply
    71,363.60x = 107,036.94 × 18,777.20
  4. Step 4: Simplify right side
    71,363.60x = 2,009,854,029.77
  5. Step 5: Solve for x
    x = 2,009,854,029.77/71,363.60
  6. Step 6: Final answer
    x = 28,163.57

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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.