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Finding the Fourth Proportional to 85,520.60, 128,268.82 and 29,359.72

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Solution

The fourth proportional to 85,520.60, 128,268.82 and 29,359.72 is: 44,035.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,520.60 : 128,268.82 = 29,359.72 : x
  2. Step 2: Convert to fraction form
    85,520.60/128,268.82 = 29,359.72/x
  3. Step 3: Cross multiply
    85,520.60x = 128,268.82 × 29,359.72
  4. Step 4: Simplify right side
    85,520.60x = 3,765,936,639.93
  5. Step 5: Solve for x
    x = 3,765,936,639.93/85,520.60
  6. Step 6: Final answer
    x = 44,035.43

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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.