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Finding the Fourth Proportional to 216,717, 299,082.72 and 121,230.12

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Solution

The fourth proportional to 216,717, 299,082.72 and 121,230.12 is: 167,304.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,717 : 299,082.72 = 121,230.12 : x
  2. Step 2: Convert to fraction form
    216,717/299,082.72 = 121,230.12/x
  3. Step 3: Cross multiply
    216,717x = 299,082.72 × 121,230.12
  4. Step 4: Simplify right side
    216,717x = 36,257,834,035.53
  5. Step 5: Solve for x
    x = 36,257,834,035.53/216,717
  6. Step 6: Final answer
    x = 167,304.98

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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.