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Finding the Fourth Proportional to 58,679.11, 87,979.78 and 21,234.31

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Solution

The fourth proportional to 58,679.11, 87,979.78 and 21,234.31 is: 31,837.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    58,679.11 : 87,979.78 = 21,234.31 : x
  2. Step 2: Convert to fraction form
    58,679.11/87,979.78 = 21,234.31/x
  3. Step 3: Cross multiply
    58,679.11x = 87,979.78 × 21,234.31
  4. Step 4: Simplify right side
    58,679.11x = 1,868,190,223.73
  5. Step 5: Solve for x
    x = 1,868,190,223.73/58,679.11
  6. Step 6: Final answer
    x = 31,837.40

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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.