Home / 81,438.47-112,391.30-51,249.66

Finding the Fourth Proportional to 81,438.47, 112,391.30 and 51,249.66

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Solution

The fourth proportional to 81,438.47, 112,391.30 and 51,249.66 is: 70,728.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,438.47 : 112,391.30 = 51,249.66 : x
  2. Step 2: Convert to fraction form
    81,438.47/112,391.30 = 51,249.66/x
  3. Step 3: Cross multiply
    81,438.47x = 112,391.30 × 51,249.66
  4. Step 4: Simplify right side
    81,438.47x = 5,760,015,911.96
  5. Step 5: Solve for x
    x = 5,760,015,911.96/81,438.47
  6. Step 6: Final answer
    x = 70,728.44

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.