Home / 102,579.44-141,243.82-87,438.11

Finding the Fourth Proportional to 102,579.44, 141,243.82 and 87,438.11

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Solution

The fourth proportional to 102,579.44, 141,243.82 and 87,438.11 is: 120,395.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    102,579.44 : 141,243.82 = 87,438.11 : x
  2. Step 2: Convert to fraction form
    102,579.44/141,243.82 = 87,438.11/x
  3. Step 3: Cross multiply
    102,579.44x = 141,243.82 × 87,438.11
  4. Step 4: Simplify right side
    102,579.44x = 12,350,091,745.17
  5. Step 5: Solve for x
    x = 12,350,091,745.17/102,579.44
  6. Step 6: Final answer
    x = 120,395.40

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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.