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Finding the Fourth Proportional to 52,479.99, 78,732.29 and 20,891.98

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Solution

The fourth proportional to 52,479.99, 78,732.29 and 20,891.98 is: 31,342.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,479.99 : 78,732.29 = 20,891.98 : x
  2. Step 2: Convert to fraction form
    52,479.99/78,732.29 = 20,891.98/x
  3. Step 3: Cross multiply
    52,479.99x = 78,732.29 × 20,891.98
  4. Step 4: Simplify right side
    52,479.99x = 1,644,873,323.57
  5. Step 5: Solve for x
    x = 1,644,873,323.57/52,479.99
  6. Step 6: Final answer
    x = 31,342.87

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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.