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Finding the Fourth Proportional to 85,540.60, 128,310.90 and 23,211.10

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Solution

The fourth proportional to 85,540.60, 128,310.90 and 23,211.10 is: 34,816.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,540.60 : 128,310.90 = 23,211.10 : x
  2. Step 2: Convert to fraction form
    85,540.60/128,310.90 = 23,211.10/x
  3. Step 3: Cross multiply
    85,540.60x = 128,310.90 × 23,211.10
  4. Step 4: Simplify right side
    85,540.60x = 2,978,237,130.99
  5. Step 5: Solve for x
    x = 2,978,237,130.99/85,540.60
  6. Step 6: Final answer
    x = 34,816.65

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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.