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Finding the Fourth Proportional to 217,285.20, 299,853.90 and 121,792.68

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Solution

The fourth proportional to 217,285.20, 299,853.90 and 121,792.68 is: 168,074.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,285.20 : 299,853.90 = 121,792.68 : x
  2. Step 2: Convert to fraction form
    217,285.20/299,853.90 = 121,792.68/x
  3. Step 3: Cross multiply
    217,285.20x = 299,853.90 × 121,792.68
  4. Step 4: Simplify right side
    217,285.20x = 36,520,010,089.45
  5. Step 5: Solve for x
    x = 36,520,010,089.45/217,285.20
  6. Step 6: Final answer
    x = 168,074.08

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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.