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Finding the Fourth Proportional to 74,440.60, 111,488.10 and 72,712.60

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Solution

The fourth proportional to 74,440.60, 111,488.10 and 72,712.60 is: 108,900.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,440.60 : 111,488.10 = 72,712.60 : x
  2. Step 2: Convert to fraction form
    74,440.60/111,488.10 = 72,712.60/x
  3. Step 3: Cross multiply
    74,440.60x = 111,488.10 × 72,712.60
  4. Step 4: Simplify right side
    74,440.60x = 8,106,589,620.06
  5. Step 5: Solve for x
    x = 8,106,589,620.06/74,440.60
  6. Step 6: Final answer
    x = 108,900.11

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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.