Home / 212,722.78-319,139.52-79,613.50

Finding the Fourth Proportional to 212,722.78, 319,139.52 and 79,613.50

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Solution

The fourth proportional to 212,722.78, 319,139.52 and 79,613.50 is: 119,440.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,722.78 : 319,139.52 = 79,613.50 : x
  2. Step 2: Convert to fraction form
    212,722.78/319,139.52 = 79,613.50/x
  3. Step 3: Cross multiply
    212,722.78x = 319,139.52 × 79,613.50
  4. Step 4: Simplify right side
    212,722.78x = 25,407,814,175.52
  5. Step 5: Solve for x
    x = 25,407,814,175.52/212,722.78
  6. Step 6: Final answer
    x = 119,440.97

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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.