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Finding the Fourth Proportional to 115,127.78, 171,882.17 and 87,967.98

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Solution

The fourth proportional to 115,127.78, 171,882.17 and 87,967.98 is: 131,333.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,127.78 : 171,882.17 = 87,967.98 : x
  2. Step 2: Convert to fraction form
    115,127.78/171,882.17 = 87,967.98/x
  3. Step 3: Cross multiply
    115,127.78x = 171,882.17 × 87,967.98
  4. Step 4: Simplify right side
    115,127.78x = 15,120,126,868.28
  5. Step 5: Solve for x
    x = 15,120,126,868.28/115,127.78
  6. Step 6: Final answer
    x = 131,333.44

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.