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Finding the Fourth Proportional to 289,082.70, 433,516.17 and 99,489.90

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Solution

The fourth proportional to 289,082.70, 433,516.17 and 99,489.90 is: 149,197.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,082.70 : 433,516.17 = 99,489.90 : x
  2. Step 2: Convert to fraction form
    289,082.70/433,516.17 = 99,489.90/x
  3. Step 3: Cross multiply
    289,082.70x = 433,516.17 × 99,489.90
  4. Step 4: Simplify right side
    289,082.70x = 43,130,480,401.68
  5. Step 5: Solve for x
    x = 43,130,480,401.68/289,082.70
  6. Step 6: Final answer
    x = 149,197.72

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.