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Finding the Fourth Proportional to 119,115.20, 178,519.20 and 91,275.20

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Solution

The fourth proportional to 119,115.20, 178,519.20 and 91,275.20 is: 136,795.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,115.20 : 178,519.20 = 91,275.20 : x
  2. Step 2: Convert to fraction form
    119,115.20/178,519.20 = 91,275.20/x
  3. Step 3: Cross multiply
    119,115.20x = 178,519.20 × 91,275.20
  4. Step 4: Simplify right side
    119,115.20x = 16,294,375,683.84
  5. Step 5: Solve for x
    x = 16,294,375,683.84/119,115.20
  6. Step 6: Final answer
    x = 136,795.10

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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.