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Finding the Fourth Proportional to 73,115.30, 109,672.95 and 66,335.60

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Solution

The fourth proportional to 73,115.30, 109,672.95 and 66,335.60 is: 99,503.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,115.30 : 109,672.95 = 66,335.60 : x
  2. Step 2: Convert to fraction form
    73,115.30/109,672.95 = 66,335.60/x
  3. Step 3: Cross multiply
    73,115.30x = 109,672.95 × 66,335.60
  4. Step 4: Simplify right side
    73,115.30x = 7,275,220,942.02
  5. Step 5: Solve for x
    x = 7,275,220,942.02/73,115.30
  6. Step 6: Final answer
    x = 99,503.40

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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.