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Finding the Fourth Proportional to 65,325, 90,149.16 and 35,517.64

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Solution

The fourth proportional to 65,325, 90,149.16 and 35,517.64 is: 49,014.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,325 : 90,149.16 = 35,517.64 : x
  2. Step 2: Convert to fraction form
    65,325/90,149.16 = 35,517.64/x
  3. Step 3: Cross multiply
    65,325x = 90,149.16 × 35,517.64
  4. Step 4: Simplify right side
    65,325x = 3,201,885,411.18
  5. Step 5: Solve for x
    x = 3,201,885,411.18/65,325
  6. Step 6: Final answer
    x = 49,014.70

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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.