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Finding the Fourth Proportional to 65,361.43, 90,280.98 and 53,917.81

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Solution

The fourth proportional to 65,361.43, 90,280.98 and 53,917.81 is: 74,474.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,361.43 : 90,280.98 = 53,917.81 : x
  2. Step 2: Convert to fraction form
    65,361.43/90,280.98 = 53,917.81/x
  3. Step 3: Cross multiply
    65,361.43x = 90,280.98 × 53,917.81
  4. Step 4: Simplify right side
    65,361.43x = 4,867,752,274.85
  5. Step 5: Solve for x
    x = 4,867,752,274.85/65,361.43
  6. Step 6: Final answer
    x = 74,474.39

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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.