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Finding the Fourth Proportional to 76,115.80, 114,128.60 and 36,145.64

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Solution

The fourth proportional to 76,115.80, 114,128.60 and 36,145.64 is: 54,197.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,115.80 : 114,128.60 = 36,145.64 : x
  2. Step 2: Convert to fraction form
    76,115.80/114,128.60 = 36,145.64/x
  3. Step 3: Cross multiply
    76,115.80x = 114,128.60 × 36,145.64
  4. Step 4: Simplify right side
    76,115.80x = 4,125,251,393.90
  5. Step 5: Solve for x
    x = 4,125,251,393.90/76,115.80
  6. Step 6: Final answer
    x = 54,197.04

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1.5x scale

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.