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Finding the Fourth Proportional to 91,908.60, 126,866.46 and 55,611.92

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Solution

The fourth proportional to 91,908.60, 126,866.46 and 55,611.92 is: 76,764.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,908.60 : 126,866.46 = 55,611.92 : x
  2. Step 2: Convert to fraction form
    91,908.60/126,866.46 = 55,611.92/x
  3. Step 3: Cross multiply
    91,908.60x = 126,866.46 × 55,611.92
  4. Step 4: Simplify right side
    91,908.60x = 7,055,287,424.20
  5. Step 5: Solve for x
    x = 7,055,287,424.20/91,908.60
  6. Step 6: Final answer
    x = 76,764.17

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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.