Home / 89,721.72-123,815.40-49,434.36

Finding the Fourth Proportional to 89,721.72, 123,815.40 and 49,434.36

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Solution

The fourth proportional to 89,721.72, 123,815.40 and 49,434.36 is: 68,219.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    89,721.72 : 123,815.40 = 49,434.36 : x
  2. Step 2: Convert to fraction form
    89,721.72/123,815.40 = 49,434.36/x
  3. Step 3: Cross multiply
    89,721.72x = 123,815.40 × 49,434.36
  4. Step 4: Simplify right side
    89,721.72x = 6,120,735,057.14
  5. Step 5: Solve for x
    x = 6,120,735,057.14/89,721.72
  6. Step 6: Final answer
    x = 68,219.10

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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.