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Finding the Fourth Proportional to 99,281.28, 148,932.81 and 43,082.76

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Solution

The fourth proportional to 99,281.28, 148,932.81 and 43,082.76 is: 64,628.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,281.28 : 148,932.81 = 43,082.76 : x
  2. Step 2: Convert to fraction form
    99,281.28/148,932.81 = 43,082.76/x
  3. Step 3: Cross multiply
    99,281.28x = 148,932.81 × 43,082.76
  4. Step 4: Simplify right side
    99,281.28x = 6,416,436,509.36
  5. Step 5: Solve for x
    x = 6,416,436,509.36/99,281.28
  6. Step 6: Final answer
    x = 64,628.87

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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.