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Finding the Fourth Proportional to 143,495.74, 215,243.25 and 68,388.22

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Solution

The fourth proportional to 143,495.74, 215,243.25 and 68,388.22 is: 102,582.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,495.74 : 215,243.25 = 68,388.22 : x
  2. Step 2: Convert to fraction form
    143,495.74/215,243.25 = 68,388.22/x
  3. Step 3: Cross multiply
    143,495.74x = 215,243.25 × 68,388.22
  4. Step 4: Simplify right side
    143,495.74x = 14,720,102,734.52
  5. Step 5: Solve for x
    x = 14,720,102,734.52/143,495.74
  6. Step 6: Final answer
    x = 102,582.16

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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.