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Finding the Fourth Proportional to 52,986.72, 79,462.53 and 21,388.62

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Solution

The fourth proportional to 52,986.72, 79,462.53 and 21,388.62 is: 32,075.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,986.72 : 79,462.53 = 21,388.62 : x
  2. Step 2: Convert to fraction form
    52,986.72/79,462.53 = 21,388.62/x
  3. Step 3: Cross multiply
    52,986.72x = 79,462.53 × 21,388.62
  4. Step 4: Simplify right side
    52,986.72x = 1,699,593,858.41
  5. Step 5: Solve for x
    x = 1,699,593,858.41/52,986.72
  6. Step 6: Final answer
    x = 32,075.85

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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.