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Finding the Fourth Proportional to 127,178.78, 175,515.39 and 73,467.86

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Solution

The fourth proportional to 127,178.78, 175,515.39 and 73,467.86 is: 101,390.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,178.78 : 175,515.39 = 73,467.86 : x
  2. Step 2: Convert to fraction form
    127,178.78/175,515.39 = 73,467.86/x
  3. Step 3: Cross multiply
    127,178.78x = 175,515.39 × 73,467.86
  4. Step 4: Simplify right side
    127,178.78x = 12,894,739,222.79
  5. Step 5: Solve for x
    x = 12,894,739,222.79/127,178.78
  6. Step 6: Final answer
    x = 101,390.65

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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.