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Finding the Fourth Proportional to 73,281.60, 109,922.40 and 47,912.40

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Solution

The fourth proportional to 73,281.60, 109,922.40 and 47,912.40 is: 71,868.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    73,281.60 : 109,922.40 = 47,912.40 : x
  2. Step 2: Convert to fraction form
    73,281.60/109,922.40 = 47,912.40/x
  3. Step 3: Cross multiply
    73,281.60x = 109,922.40 × 47,912.40
  4. Step 4: Simplify right side
    73,281.60x = 5,266,645,997.76
  5. Step 5: Solve for x
    x = 5,266,645,997.76/73,281.60
  6. Step 6: Final answer
    x = 71,868.60

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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.