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Finding the Fourth Proportional to 115,468.40, 173,040.60 and 91,816.40

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Solution

The fourth proportional to 115,468.40, 173,040.60 and 91,816.40 is: 137,595.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,468.40 : 173,040.60 = 91,816.40 : x
  2. Step 2: Convert to fraction form
    115,468.40/173,040.60 = 91,816.40/x
  3. Step 3: Cross multiply
    115,468.40x = 173,040.60 × 91,816.40
  4. Step 4: Simplify right side
    115,468.40x = 15,887,964,945.84
  5. Step 5: Solve for x
    x = 15,887,964,945.84/115,468.40
  6. Step 6: Final answer
    x = 137,595.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.