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Finding the Fourth Proportional to 60,979.72, 91,472.64 and 19,429.96

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Solution

The fourth proportional to 60,979.72, 91,472.64 and 19,429.96 is: 29,145.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    60,979.72 : 91,472.64 = 19,429.96 : x
  2. Step 2: Convert to fraction form
    60,979.72/91,472.64 = 19,429.96/x
  3. Step 3: Cross multiply
    60,979.72x = 91,472.64 × 19,429.96
  4. Step 4: Simplify right side
    60,979.72x = 1,777,309,736.29
  5. Step 5: Solve for x
    x = 1,777,309,736.29/60,979.72
  6. Step 6: Final answer
    x = 29,145.92

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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.