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Finding the Fourth Proportional to 73,511.69, 110,267.57 and 20,921.15

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Solution

The fourth proportional to 73,511.69, 110,267.57 and 20,921.15 is: 31,381.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,511.69 : 110,267.57 = 20,921.15 : x
  2. Step 2: Convert to fraction form
    73,511.69/110,267.57 = 20,921.15/x
  3. Step 3: Cross multiply
    73,511.69x = 110,267.57 × 20,921.15
  4. Step 4: Simplify right side
    73,511.69x = 2,306,924,700.08
  5. Step 5: Solve for x
    x = 2,306,924,700.08/73,511.69
  6. Step 6: Final answer
    x = 31,381.74

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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.