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Finding the Fourth Proportional to 179,431.20, 269,125.20 and 74,239.20

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Solution

The fourth proportional to 179,431.20, 269,125.20 and 74,239.20 is: 111,349.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    179,431.20 : 269,125.20 = 74,239.20 : x
  2. Step 2: Convert to fraction form
    179,431.20/269,125.20 = 74,239.20/x
  3. Step 3: Cross multiply
    179,431.20x = 269,125.20 × 74,239.20
  4. Step 4: Simplify right side
    179,431.20x = 19,979,639,547.84
  5. Step 5: Solve for x
    x = 19,979,639,547.84/179,431.20
  6. Step 6: Final answer
    x = 111,349.86

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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.