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Finding the Fourth Proportional to 87,311.96, 120,458.88 and 57,114.48

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Solution

The fourth proportional to 87,311.96, 120,458.88 and 57,114.48 is: 78,797.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,311.96 : 120,458.88 = 57,114.48 : x
  2. Step 2: Convert to fraction form
    87,311.96/120,458.88 = 57,114.48/x
  3. Step 3: Cross multiply
    87,311.96x = 120,458.88 × 57,114.48
  4. Step 4: Simplify right side
    87,311.96x = 6,879,946,292.58
  5. Step 5: Solve for x
    x = 6,879,946,292.58/87,311.96
  6. Step 6: Final answer
    x = 78,797.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.