Home / 129,468.88-178,722.28-87,052

Finding the Fourth Proportional to 129,468.88, 178,722.28 and 87,052

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Solution

The fourth proportional to 129,468.88, 178,722.28 and 87,052 is: 120,168.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,468.88 : 178,722.28 = 87,052 : x
  2. Step 2: Convert to fraction form
    129,468.88/178,722.28 = 87,052/x
  3. Step 3: Cross multiply
    129,468.88x = 178,722.28 × 87,052
  4. Step 4: Simplify right side
    129,468.88x = 15,558,131,918.56
  5. Step 5: Solve for x
    x = 15,558,131,918.56/129,468.88
  6. Step 6: Final answer
    x = 120,168.89

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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.