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Finding the Fourth Proportional to 143,460.32, 215,098.17 and 68,578.79

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Solution

The fourth proportional to 143,460.32, 215,098.17 and 68,578.79 is: 102,824.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,460.32 : 215,098.17 = 68,578.79 : x
  2. Step 2: Convert to fraction form
    143,460.32/215,098.17 = 68,578.79/x
  3. Step 3: Cross multiply
    143,460.32x = 215,098.17 × 68,578.79
  4. Step 4: Simplify right side
    143,460.32x = 14,751,170,897.15
  5. Step 5: Solve for x
    x = 14,751,170,897.15/143,460.32
  6. Step 6: Final answer
    x = 102,824.05

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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.