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Finding the Fourth Proportional to 57,976.74, 87,021.22 and 28,012.05

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Solution

The fourth proportional to 57,976.74, 87,021.22 and 28,012.05 is: 42,045.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,976.74 : 87,021.22 = 28,012.05 : x
  2. Step 2: Convert to fraction form
    57,976.74/87,021.22 = 28,012.05/x
  3. Step 3: Cross multiply
    57,976.74x = 87,021.22 × 28,012.05
  4. Step 4: Simplify right side
    57,976.74x = 2,437,642,909.49
  5. Step 5: Solve for x
    x = 2,437,642,909.49/57,976.74
  6. Step 6: Final answer
    x = 42,045.19

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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.