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Finding the Fourth Proportional to 156,248.56, 215,623.36 and 86,398.48

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Solution

The fourth proportional to 156,248.56, 215,623.36 and 86,398.48 is: 119,230.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,248.56 : 215,623.36 = 86,398.48 : x
  2. Step 2: Convert to fraction form
    156,248.56/215,623.36 = 86,398.48/x
  3. Step 3: Cross multiply
    156,248.56x = 215,623.36 × 86,398.48
  4. Step 4: Simplify right side
    156,248.56x = 18,629,530,556.49
  5. Step 5: Solve for x
    x = 18,629,530,556.49/156,248.56
  6. Step 6: Final answer
    x = 119,230.09

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.