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Finding the Fourth Proportional to 91,190.71, 125,790.60 and 54,866.98

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Solution

The fourth proportional to 91,190.71, 125,790.60 and 54,866.98 is: 75,684.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,190.71 : 125,790.60 = 54,866.98 : x
  2. Step 2: Convert to fraction form
    91,190.71/125,790.60 = 54,866.98/x
  3. Step 3: Cross multiply
    91,190.71x = 125,790.60 × 54,866.98
  4. Step 4: Simplify right side
    91,190.71x = 6,901,750,334.39
  5. Step 5: Solve for x
    x = 6,901,750,334.39/91,190.71
  6. Step 6: Final answer
    x = 75,684.80

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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.