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Finding the Fourth Proportional to 91,611.39, 138,041.19 and 75,336.03

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Solution

The fourth proportional to 91,611.39, 138,041.19 and 75,336.03 is: 113,517.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,611.39 : 138,041.19 = 75,336.03 : x
  2. Step 2: Convert to fraction form
    91,611.39/138,041.19 = 75,336.03/x
  3. Step 3: Cross multiply
    91,611.39x = 138,041.19 × 75,336.03
  4. Step 4: Simplify right side
    91,611.39x = 10,399,475,231.08
  5. Step 5: Solve for x
    x = 10,399,475,231.08/91,611.39
  6. Step 6: Final answer
    x = 113,517.27

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.