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Finding the Fourth Proportional to 65,736, 90,715.68 and 35,928

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Solution

The fourth proportional to 65,736, 90,715.68 and 35,928 is: 49,580.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,736 : 90,715.68 = 35,928 : x
  2. Step 2: Convert to fraction form
    65,736/90,715.68 = 35,928/x
  3. Step 3: Cross multiply
    65,736x = 90,715.68 × 35,928
  4. Step 4: Simplify right side
    65,736x = 3,259,232,951.04
  5. Step 5: Solve for x
    x = 3,259,232,951.04/65,736
  6. Step 6: Final answer
    x = 49,580.64

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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.