Home / 99,664.60-149,205.30-66,422.20

Finding the Fourth Proportional to 99,664.60, 149,205.30 and 66,422.20

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Solution

The fourth proportional to 99,664.60, 149,205.30 and 66,422.20 is: 99,438.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,664.60 : 149,205.30 = 66,422.20 : x
  2. Step 2: Convert to fraction form
    99,664.60/149,205.30 = 66,422.20/x
  3. Step 3: Cross multiply
    99,664.60x = 149,205.30 × 66,422.20
  4. Step 4: Simplify right side
    99,664.60x = 9,910,544,277.66
  5. Step 5: Solve for x
    x = 9,910,544,277.66/99,664.60
  6. Step 6: Final answer
    x = 99,438.96

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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.