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Finding the Fourth Proportional to 87,172.71, 130,581.59 and 79,906.92

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Solution

The fourth proportional to 87,172.71, 130,581.59 and 79,906.92 is: 119,697.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,172.71 : 130,581.59 = 79,906.92 : x
  2. Step 2: Convert to fraction form
    87,172.71/130,581.59 = 79,906.92/x
  3. Step 3: Cross multiply
    87,172.71x = 130,581.59 × 79,906.92
  4. Step 4: Simplify right side
    87,172.71x = 10,434,372,266.07
  5. Step 5: Solve for x
    x = 10,434,372,266.07/87,172.71
  6. Step 6: Final answer
    x = 119,697.69

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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.