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Finding the Fourth Proportional to 65,449.28, 90,361.76 and 40,313.28

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Solution

The fourth proportional to 65,449.28, 90,361.76 and 40,313.28 is: 55,658.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,449.28 : 90,361.76 = 40,313.28 : x
  2. Step 2: Convert to fraction form
    65,449.28/90,361.76 = 40,313.28/x
  3. Step 3: Cross multiply
    65,449.28x = 90,361.76 × 40,313.28
  4. Step 4: Simplify right side
    65,449.28x = 3,642,778,932.17
  5. Step 5: Solve for x
    x = 3,642,778,932.17/65,449.28
  6. Step 6: Final answer
    x = 55,658.04

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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.