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Finding the Fourth Proportional to 91,517.97, 125,913.63 and 80,715.81

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Solution

The fourth proportional to 91,517.97, 125,913.63 and 80,715.81 is: 111,051.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,517.97 : 125,913.63 = 80,715.81 : x
  2. Step 2: Convert to fraction form
    91,517.97/125,913.63 = 80,715.81/x
  3. Step 3: Cross multiply
    91,517.97x = 125,913.63 × 80,715.81
  4. Step 4: Simplify right side
    91,517.97x = 10,163,220,635.49
  5. Step 5: Solve for x
    x = 10,163,220,635.49/91,517.97
  6. Step 6: Final answer
    x = 111,051.64

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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.