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Finding the Fourth Proportional to 73,563.60, 110,312.68 and 20,961.20

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Solution

The fourth proportional to 73,563.60, 110,312.68 and 20,961.20 is: 31,432.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,563.60 : 110,312.68 = 20,961.20 : x
  2. Step 2: Convert to fraction form
    73,563.60/110,312.68 = 20,961.20/x
  3. Step 3: Cross multiply
    73,563.60x = 110,312.68 × 20,961.20
  4. Step 4: Simplify right side
    73,563.60x = 2,312,286,148.02
  5. Step 5: Solve for x
    x = 2,312,286,148.02/73,563.60
  6. Step 6: Final answer
    x = 31,432.48

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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.