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Finding the Fourth Proportional to 91,107.75, 125,558.45 and 65,569.79

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Solution

The fourth proportional to 91,107.75, 125,558.45 and 65,569.79 is: 90,363.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,107.75 : 125,558.45 = 65,569.79 : x
  2. Step 2: Convert to fraction form
    91,107.75/125,558.45 = 65,569.79/x
  3. Step 3: Cross multiply
    91,107.75x = 125,558.45 × 65,569.79
  4. Step 4: Simplify right side
    91,107.75x = 8,232,840,243.58
  5. Step 5: Solve for x
    x = 8,232,840,243.58/91,107.75
  6. Step 6: Final answer
    x = 90,363.78

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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.