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Finding the Fourth Proportional to 217,960.72, 300,778.68 and 121,164.10

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Solution

The fourth proportional to 217,960.72, 300,778.68 and 121,164.10 is: 167,202.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,960.72 : 300,778.68 = 121,164.10 : x
  2. Step 2: Convert to fraction form
    217,960.72/300,778.68 = 121,164.10/x
  3. Step 3: Cross multiply
    217,960.72x = 300,778.68 × 121,164.10
  4. Step 4: Simplify right side
    217,960.72x = 36,443,578,061.39
  5. Step 5: Solve for x
    x = 36,443,578,061.39/217,960.72
  6. Step 6: Final answer
    x = 167,202.50

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1.5x scale

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.