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Finding the Fourth Proportional to 281,143.80, 387,979.38 and 153,819

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Solution

The fourth proportional to 281,143.80, 387,979.38 and 153,819 is: 212,270.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,143.80 : 387,979.38 = 153,819 : x
  2. Step 2: Convert to fraction form
    281,143.80/387,979.38 = 153,819/x
  3. Step 3: Cross multiply
    281,143.80x = 387,979.38 × 153,819
  4. Step 4: Simplify right side
    281,143.80x = 59,678,600,252.22
  5. Step 5: Solve for x
    x = 59,678,600,252.22/281,143.80
  6. Step 6: Final answer
    x = 212,270.73

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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.