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Finding the Fourth Proportional to 91,104.80, 136,426.80 and 72,672.80

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Solution

The fourth proportional to 91,104.80, 136,426.80 and 72,672.80 is: 108,825.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,104.80 : 136,426.80 = 72,672.80 : x
  2. Step 2: Convert to fraction form
    91,104.80/136,426.80 = 72,672.80/x
  3. Step 3: Cross multiply
    91,104.80x = 136,426.80 × 72,672.80
  4. Step 4: Simplify right side
    91,104.80x = 9,914,517,551.04
  5. Step 5: Solve for x
    x = 9,914,517,551.04/91,104.80
  6. Step 6: Final answer
    x = 108,825.41

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.