Home / 99,983.78-137,981.30-54,664.78

Finding the Fourth Proportional to 99,983.78, 137,981.30 and 54,664.78

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Solution

The fourth proportional to 99,983.78, 137,981.30 and 54,664.78 is: 75,439.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    99,983.78 : 137,981.30 = 54,664.78 : x
  2. Step 2: Convert to fraction form
    99,983.78/137,981.30 = 54,664.78/x
  3. Step 3: Cross multiply
    99,983.78x = 137,981.30 × 54,664.78
  4. Step 4: Simplify right side
    99,983.78x = 7,542,717,408.61
  5. Step 5: Solve for x
    x = 7,542,717,408.61/99,983.78
  6. Step 6: Final answer
    x = 75,439.41

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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.