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Finding the Fourth Proportional to 65,449.81, 90,320.74 and 36,378.18

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Solution

The fourth proportional to 65,449.81, 90,320.74 and 36,378.18 is: 50,201.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,449.81 : 90,320.74 = 36,378.18 : x
  2. Step 2: Convert to fraction form
    65,449.81/90,320.74 = 36,378.18/x
  3. Step 3: Cross multiply
    65,449.81x = 90,320.74 × 36,378.18
  4. Step 4: Simplify right side
    65,449.81x = 3,285,703,685.85
  5. Step 5: Solve for x
    x = 3,285,703,685.85/65,449.81
  6. Step 6: Final answer
    x = 50,201.89

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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.