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Finding the Fourth Proportional to 217,654.43, 300,346.65 and 122,142.67

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Solution

The fourth proportional to 217,654.43, 300,346.65 and 122,142.67 is: 168,547.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,654.43 : 300,346.65 = 122,142.67 : x
  2. Step 2: Convert to fraction form
    217,654.43/300,346.65 = 122,142.67/x
  3. Step 3: Cross multiply
    217,654.43x = 300,346.65 × 122,142.67
  4. Step 4: Simplify right side
    217,654.43x = 36,685,141,756.56
  5. Step 5: Solve for x
    x = 36,685,141,756.56/217,654.43
  6. Step 6: Final answer
    x = 168,547.65

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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.