Home / 99,664.10-149,204.55-66,421.70

Finding the Fourth Proportional to 99,664.10, 149,204.55 and 66,421.70

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Solution

The fourth proportional to 99,664.10, 149,204.55 and 66,421.70 is: 99,438.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,664.10 : 149,204.55 = 66,421.70 : x
  2. Step 2: Convert to fraction form
    99,664.10/149,204.55 = 66,421.70/x
  3. Step 3: Cross multiply
    99,664.10x = 149,204.55 × 66,421.70
  4. Step 4: Simplify right side
    99,664.10x = 9,910,419,858.74
  5. Step 5: Solve for x
    x = 9,910,419,858.74/99,664.10
  6. Step 6: Final answer
    x = 99,438.21

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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.