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Finding the Fourth Proportional to 52,762.96, 79,143.78 and 21,187

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Solution

The fourth proportional to 52,762.96, 79,143.78 and 21,187 is: 31,780.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,762.96 : 79,143.78 = 21,187 : x
  2. Step 2: Convert to fraction form
    52,762.96/79,143.78 = 21,187/x
  3. Step 3: Cross multiply
    52,762.96x = 79,143.78 × 21,187
  4. Step 4: Simplify right side
    52,762.96x = 1,676,819,266.86
  5. Step 5: Solve for x
    x = 1,676,819,266.86/52,762.96
  6. Step 6: Final answer
    x = 31,780.23

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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.