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Finding the Fourth Proportional to 215,837.92, 323,479.80 and 103,349.58

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Solution

The fourth proportional to 215,837.92, 323,479.80 and 103,349.58 is: 154,891.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    215,837.92 : 323,479.80 = 103,349.58 : x
  2. Step 2: Convert to fraction form
    215,837.92/323,479.80 = 103,349.58/x
  3. Step 3: Cross multiply
    215,837.92x = 323,479.80 × 103,349.58
  4. Step 4: Simplify right side
    215,837.92x = 33,431,501,468.48
  5. Step 5: Solve for x
    x = 33,431,501,468.48/215,837.92
  6. Step 6: Final answer
    x = 154,891.70

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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.