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Finding the Fourth Proportional to 65,318.44, 90,143 and 36,647.17

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Solution

The fourth proportional to 65,318.44, 90,143 and 36,647.17 is: 50,575.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,318.44 : 90,143 = 36,647.17 : x
  2. Step 2: Convert to fraction form
    65,318.44/90,143 = 36,647.17/x
  3. Step 3: Cross multiply
    65,318.44x = 90,143 × 36,647.17
  4. Step 4: Simplify right side
    65,318.44x = 3,303,485,845.31
  5. Step 5: Solve for x
    x = 3,303,485,845.31/65,318.44
  6. Step 6: Final answer
    x = 50,575.09

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1.5x scale

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.