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Finding the Fourth Proportional to 217,028.76, 299,491.29 and 121,530.57

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Solution

The fourth proportional to 217,028.76, 299,491.29 and 121,530.57 is: 167,707.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,028.76 : 299,491.29 = 121,530.57 : x
  2. Step 2: Convert to fraction form
    217,028.76/299,491.29 = 121,530.57/x
  3. Step 3: Cross multiply
    217,028.76x = 299,491.29 × 121,530.57
  4. Step 4: Simplify right side
    217,028.76x = 36,397,347,183.74
  5. Step 5: Solve for x
    x = 36,397,347,183.74/217,028.76
  6. Step 6: Final answer
    x = 167,707.48

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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.