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Finding the Fourth Proportional to 91,988.82, 126,994.83 and 55,696.47

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Solution

The fourth proportional to 91,988.82, 126,994.83 and 55,696.47 is: 76,891.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,988.82 : 126,994.83 = 55,696.47 : x
  2. Step 2: Convert to fraction form
    91,988.82/126,994.83 = 55,696.47/x
  3. Step 3: Cross multiply
    91,988.82x = 126,994.83 × 55,696.47
  4. Step 4: Simplify right side
    91,988.82x = 7,073,163,739.25
  5. Step 5: Solve for x
    x = 7,073,163,739.25/91,988.82
  6. Step 6: Final answer
    x = 76,891.56

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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.