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Finding the Fourth Proportional to 91,760.76, 126,495.81 and 64,855.80

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Solution

The fourth proportional to 91,760.76, 126,495.81 and 64,855.80 is: 89,406.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,760.76 : 126,495.81 = 64,855.80 : x
  2. Step 2: Convert to fraction form
    91,760.76/126,495.81 = 64,855.80/x
  3. Step 3: Cross multiply
    91,760.76x = 126,495.81 × 64,855.80
  4. Step 4: Simplify right side
    91,760.76x = 8,203,986,954.20
  5. Step 5: Solve for x
    x = 8,203,986,954.20/91,760.76
  6. Step 6: Final answer
    x = 89,406.27

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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.