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Finding the Fourth Proportional to 52,679.91, 79,019.94 and 21,515.16

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Solution

The fourth proportional to 52,679.91, 79,019.94 and 21,515.16 is: 32,272.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,679.91 : 79,019.94 = 21,515.16 : x
  2. Step 2: Convert to fraction form
    52,679.91/79,019.94 = 21,515.16/x
  3. Step 3: Cross multiply
    52,679.91x = 79,019.94 × 21,515.16
  4. Step 4: Simplify right side
    52,679.91x = 1,700,126,652.29
  5. Step 5: Solve for x
    x = 1,700,126,652.29/52,679.91
  6. Step 6: Final answer
    x = 32,272.77

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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.