Home / 99,388.28-149,082.42-68,128.76

Finding the Fourth Proportional to 99,388.28, 149,082.42 and 68,128.76

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Solution

The fourth proportional to 99,388.28, 149,082.42 and 68,128.76 is: 102,193.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,388.28 : 149,082.42 = 68,128.76 : x
  2. Step 2: Convert to fraction form
    99,388.28/149,082.42 = 68,128.76/x
  3. Step 3: Cross multiply
    99,388.28x = 149,082.42 × 68,128.76
  4. Step 4: Simplify right side
    99,388.28x = 10,156,800,412.40
  5. Step 5: Solve for x
    x = 10,156,800,412.40/99,388.28
  6. Step 6: Final answer
    x = 102,193.14

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1.5x scale

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.