Home / 105,720.17-158,249.78-68,230.13

Finding the Fourth Proportional to 105,720.17, 158,249.78 and 68,230.13

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Solution

The fourth proportional to 105,720.17, 158,249.78 and 68,230.13 is: 102,131.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    105,720.17 : 158,249.78 = 68,230.13 : x
  2. Step 2: Convert to fraction form
    105,720.17/158,249.78 = 68,230.13/x
  3. Step 3: Cross multiply
    105,720.17x = 158,249.78 × 68,230.13
  4. Step 4: Simplify right side
    105,720.17x = 10,797,402,720.72
  5. Step 5: Solve for x
    x = 10,797,402,720.72/105,720.17
  6. Step 6: Final answer
    x = 102,131.91

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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.