Home / 143,618.70-215,428.14-68,721.24

Finding the Fourth Proportional to 143,618.70, 215,428.14 and 68,721.24

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Solution

The fourth proportional to 143,618.70, 215,428.14 and 68,721.24 is: 103,081.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,618.70 : 215,428.14 = 68,721.24 : x
  2. Step 2: Convert to fraction form
    143,618.70/215,428.14 = 68,721.24/x
  3. Step 3: Cross multiply
    143,618.70x = 215,428.14 × 68,721.24
  4. Step 4: Simplify right side
    143,618.70x = 14,804,488,911.69
  5. Step 5: Solve for x
    x = 14,804,488,911.69/143,618.70
  6. Step 6: Final answer
    x = 103,081.90

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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.