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Finding the Fourth Proportional to 91,576.67, 126,251.73 and 78,290.64

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Solution

The fourth proportional to 91,576.67, 126,251.73 and 78,290.64 is: 107,935.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    91,576.67 : 126,251.73 = 78,290.64 : x
  2. Step 2: Convert to fraction form
    91,576.67/126,251.73 = 78,290.64/x
  3. Step 3: Cross multiply
    91,576.67x = 126,251.73 × 78,290.64
  4. Step 4: Simplify right side
    91,576.67x = 9,884,328,742.81
  5. Step 5: Solve for x
    x = 9,884,328,742.81/91,576.67
  6. Step 6: Final answer
    x = 107,935.02

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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.