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Finding the Fourth Proportional to 115,171.59, 159,034.74 and 72,223.01

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Solution

The fourth proportional to 115,171.59, 159,034.74 and 72,223.01 is: 99,729.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,171.59 : 159,034.74 = 72,223.01 : x
  2. Step 2: Convert to fraction form
    115,171.59/159,034.74 = 72,223.01/x
  3. Step 3: Cross multiply
    115,171.59x = 159,034.74 × 72,223.01
  4. Step 4: Simplify right side
    115,171.59x = 11,485,967,553.99
  5. Step 5: Solve for x
    x = 11,485,967,553.99/115,171.59
  6. Step 6: Final answer
    x = 99,729.18

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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.