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Finding the Fourth Proportional to 217,290.48, 299,874.72 and 121,797.20

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Solution

The fourth proportional to 217,290.48, 299,874.72 and 121,797.20 is: 168,087.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,290.48 : 299,874.72 = 121,797.20 : x
  2. Step 2: Convert to fraction form
    217,290.48/299,874.72 = 121,797.20/x
  3. Step 3: Cross multiply
    217,290.48x = 299,874.72 × 121,797.20
  4. Step 4: Simplify right side
    217,290.48x = 36,523,901,246.78
  5. Step 5: Solve for x
    x = 36,523,901,246.78/217,290.48
  6. Step 6: Final answer
    x = 168,087.90

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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.