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Finding the Fourth Proportional to 52,808.86, 79,223.28 and 21,221.38

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Solution

The fourth proportional to 52,808.86, 79,223.28 and 21,221.38 is: 31,836.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,808.86 : 79,223.28 = 21,221.38 : x
  2. Step 2: Convert to fraction form
    52,808.86/79,223.28 = 21,221.38/x
  3. Step 3: Cross multiply
    52,808.86x = 79,223.28 × 21,221.38
  4. Step 4: Simplify right side
    52,808.86x = 1,681,227,329.73
  5. Step 5: Solve for x
    x = 1,681,227,329.73/52,808.86
  6. Step 6: Final answer
    x = 31,836.08

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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.