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Finding the Fourth Proportional to 74,427.60, 111,468.60 and 72,699.60

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Solution

The fourth proportional to 74,427.60, 111,468.60 and 72,699.60 is: 108,880.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,427.60 : 111,468.60 = 72,699.60 : x
  2. Step 2: Convert to fraction form
    74,427.60/111,468.60 = 72,699.60/x
  3. Step 3: Cross multiply
    74,427.60x = 111,468.60 × 72,699.60
  4. Step 4: Simplify right side
    74,427.60x = 8,103,722,632.56
  5. Step 5: Solve for x
    x = 8,103,722,632.56/74,427.60
  6. Step 6: Final answer
    x = 108,880.61

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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.