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Finding the Fourth Proportional to 74,386.76, 111,333.30 and 67,738.55

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Solution

The fourth proportional to 74,386.76, 111,333.30 and 67,738.55 is: 101,383.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,386.76 : 111,333.30 = 67,738.55 : x
  2. Step 2: Convert to fraction form
    74,386.76/111,333.30 = 67,738.55/x
  3. Step 3: Cross multiply
    74,386.76x = 111,333.30 × 67,738.55
  4. Step 4: Simplify right side
    74,386.76x = 7,541,555,879.06
  5. Step 5: Solve for x
    x = 7,541,555,879.06/74,386.76
  6. Step 6: Final answer
    x = 101,383.05

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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.