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Finding the Fourth Proportional to 111,901.30, 154,456.40 and 73,144.76

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Solution

The fourth proportional to 111,901.30, 154,456.40 and 73,144.76 is: 100,961.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,901.30 : 154,456.40 = 73,144.76 : x
  2. Step 2: Convert to fraction form
    111,901.30/154,456.40 = 73,144.76/x
  3. Step 3: Cross multiply
    111,901.30x = 154,456.40 × 73,144.76
  4. Step 4: Simplify right side
    111,901.30x = 11,297,675,719.04
  5. Step 5: Solve for x
    x = 11,297,675,719.04/111,901.30
  6. Step 6: Final answer
    x = 100,961.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.