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Finding the Fourth Proportional to 52,763.96, 79,145.28 and 21,188

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Solution

The fourth proportional to 52,763.96, 79,145.28 and 21,188 is: 31,781.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,763.96 : 79,145.28 = 21,188 : x
  2. Step 2: Convert to fraction form
    52,763.96/79,145.28 = 21,188/x
  3. Step 3: Cross multiply
    52,763.96x = 79,145.28 × 21,188
  4. Step 4: Simplify right side
    52,763.96x = 1,676,930,192.64
  5. Step 5: Solve for x
    x = 1,676,930,192.64/52,763.96
  6. Step 6: Final answer
    x = 31,781.73

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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.