Home / 103,418.48-155,128.13-68,350.34

Finding the Fourth Proportional to 103,418.48, 155,128.13 and 68,350.34

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Solution

The fourth proportional to 103,418.48, 155,128.13 and 68,350.34 is: 102,525.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    103,418.48 : 155,128.13 = 68,350.34 : x
  2. Step 2: Convert to fraction form
    103,418.48/155,128.13 = 68,350.34/x
  3. Step 3: Cross multiply
    103,418.48x = 155,128.13 × 68,350.34
  4. Step 4: Simplify right side
    103,418.48x = 10,603,060,429.06
  5. Step 5: Solve for x
    x = 10,603,060,429.06/103,418.48
  6. Step 6: Final answer
    x = 102,525.78

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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.