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Finding the Fourth Proportional to 85,115.64, 127,679.40 and 28,932.84

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Solution

The fourth proportional to 85,115.64, 127,679.40 and 28,932.84 is: 43,401.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,115.64 : 127,679.40 = 28,932.84 : x
  2. Step 2: Convert to fraction form
    85,115.64/127,679.40 = 28,932.84/x
  3. Step 3: Cross multiply
    85,115.64x = 127,679.40 × 28,932.84
  4. Step 4: Simplify right side
    85,115.64x = 3,694,127,651.50
  5. Step 5: Solve for x
    x = 3,694,127,651.50/85,115.64
  6. Step 6: Final answer
    x = 43,401.28

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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.