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Finding the Fourth Proportional to 111,990.68, 168,091.54 and 74,576.92

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Solution

The fourth proportional to 111,990.68, 168,091.54 and 74,576.92 is: 111,935.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    111,990.68 : 168,091.54 = 74,576.92 : x
  2. Step 2: Convert to fraction form
    111,990.68/168,091.54 = 74,576.92/x
  3. Step 3: Cross multiply
    111,990.68x = 168,091.54 × 74,576.92
  4. Step 4: Simplify right side
    111,990.68x = 12,535,749,331.26
  5. Step 5: Solve for x
    x = 12,535,749,331.26/111,990.68
  6. Step 6: Final answer
    x = 111,935.65

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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.