Home / 103,709.10-155,174.85-68,717.10

Finding the Fourth Proportional to 103,709.10, 155,174.85 and 68,717.10

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Solution

The fourth proportional to 103,709.10, 155,174.85 and 68,717.10 is: 102,818.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,709.10 : 155,174.85 = 68,717.10 : x
  2. Step 2: Convert to fraction form
    103,709.10/155,174.85 = 68,717.10/x
  3. Step 3: Cross multiply
    103,709.10x = 155,174.85 × 68,717.10
  4. Step 4: Simplify right side
    103,709.10x = 10,663,165,684.94
  5. Step 5: Solve for x
    x = 10,663,165,684.94/103,709.10
  6. Step 6: Final answer
    x = 102,818.03

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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.