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Finding the Fourth Proportional to 99,491.70, 149,237.55 and 67,998.90

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Solution

The fourth proportional to 99,491.70, 149,237.55 and 67,998.90 is: 101,998.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,491.70 : 149,237.55 = 67,998.90 : x
  2. Step 2: Convert to fraction form
    99,491.70/149,237.55 = 67,998.90/x
  3. Step 3: Cross multiply
    99,491.70x = 149,237.55 × 67,998.90
  4. Step 4: Simplify right side
    99,491.70x = 10,147,989,238.70
  5. Step 5: Solve for x
    x = 10,147,989,238.70/99,491.70
  6. Step 6: Final answer
    x = 101,998.35

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Similar ratio
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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.