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Finding the Fourth Proportional to 217,642.62, 300,376.13 and 122,154.54

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Solution

The fourth proportional to 217,642.62, 300,376.13 and 122,154.54 is: 168,589.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,642.62 : 300,376.13 = 122,154.54 : x
  2. Step 2: Convert to fraction form
    217,642.62/300,376.13 = 122,154.54/x
  3. Step 3: Cross multiply
    217,642.62x = 300,376.13 × 122,154.54
  4. Step 4: Simplify right side
    217,642.62x = 36,692,307,376.36
  5. Step 5: Solve for x
    x = 36,692,307,376.36/217,642.62
  6. Step 6: Final answer
    x = 168,589.72

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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.