Home / 212,926.28-319,229.04-128,668.52

Finding the Fourth Proportional to 212,926.28, 319,229.04 and 128,668.52

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Solution

The fourth proportional to 212,926.28, 319,229.04 and 128,668.52 is: 192,905.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,926.28 : 319,229.04 = 128,668.52 : x
  2. Step 2: Convert to fraction form
    212,926.28/319,229.04 = 128,668.52/x
  3. Step 3: Cross multiply
    212,926.28x = 319,229.04 × 128,668.52
  4. Step 4: Simplify right side
    212,926.28x = 41,074,728,117.82
  5. Step 5: Solve for x
    x = 41,074,728,117.82/212,926.28
  6. Step 6: Final answer
    x = 192,905.86

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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.