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Finding the Fourth Proportional to 139,463.44, 209,144.54 and 76,330.20

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Solution

The fourth proportional to 139,463.44, 209,144.54 and 76,330.20 is: 114,467.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,463.44 : 209,144.54 = 76,330.20 : x
  2. Step 2: Convert to fraction form
    139,463.44/209,144.54 = 76,330.20/x
  3. Step 3: Cross multiply
    139,463.44x = 209,144.54 × 76,330.20
  4. Step 4: Simplify right side
    139,463.44x = 15,964,044,567.11
  5. Step 5: Solve for x
    x = 15,964,044,567.11/139,463.44
  6. Step 6: Final answer
    x = 114,467.59

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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.