Home / 128,905.43-193,311.82-44,642.90

Finding the Fourth Proportional to 128,905.43, 193,311.82 and 44,642.90

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Solution

The fourth proportional to 128,905.43, 193,311.82 and 44,642.90 is: 66,948.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,905.43 : 193,311.82 = 44,642.90 : x
  2. Step 2: Convert to fraction form
    128,905.43/193,311.82 = 44,642.90/x
  3. Step 3: Cross multiply
    128,905.43x = 193,311.82 × 44,642.90
  4. Step 4: Simplify right side
    128,905.43x = 8,629,999,449.67
  5. Step 5: Solve for x
    x = 8,629,999,449.67/128,905.43
  6. Step 6: Final answer
    x = 66,948.30

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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.