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Finding the Fourth Proportional to 57,976.40, 87,022.20 and 28,427.60

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Solution

The fourth proportional to 57,976.40, 87,022.20 and 28,427.60 is: 42,669.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    57,976.40 : 87,022.20 = 28,427.60 : x
  2. Step 2: Convert to fraction form
    57,976.40/87,022.20 = 28,427.60/x
  3. Step 3: Cross multiply
    57,976.40x = 87,022.20 × 28,427.60
  4. Step 4: Simplify right side
    57,976.40x = 2,473,832,292.72
  5. Step 5: Solve for x
    x = 2,473,832,292.72/57,976.40
  6. Step 6: Final answer
    x = 42,669.64

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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.