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Finding the Fourth Proportional to 73,910.88, 110,856.60 and 21,325.68

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Solution

The fourth proportional to 73,910.88, 110,856.60 and 21,325.68 is: 31,985.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,910.88 : 110,856.60 = 21,325.68 : x
  2. Step 2: Convert to fraction form
    73,910.88/110,856.60 = 21,325.68/x
  3. Step 3: Cross multiply
    73,910.88x = 110,856.60 × 21,325.68
  4. Step 4: Simplify right side
    73,910.88x = 2,364,092,377.49
  5. Step 5: Solve for x
    x = 2,364,092,377.49/73,910.88
  6. Step 6: Final answer
    x = 31,985.72

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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.