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Finding the Fourth Proportional to 91,361.70, 125,594.51 and 78,568.02

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Solution

The fourth proportional to 91,361.70, 125,594.51 and 78,568.02 is: 108,007.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,361.70 : 125,594.51 = 78,568.02 : x
  2. Step 2: Convert to fraction form
    91,361.70/125,594.51 = 78,568.02/x
  3. Step 3: Cross multiply
    91,361.70x = 125,594.51 × 78,568.02
  4. Step 4: Simplify right side
    91,361.70x = 9,867,711,580.73
  5. Step 5: Solve for x
    x = 9,867,711,580.73/91,361.70
  6. Step 6: Final answer
    x = 108,007.09

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.