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Finding the Fourth Proportional to 281,107.72, 421,800.12 and 131,358.34

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Solution

The fourth proportional to 281,107.72, 421,800.12 and 131,358.34 is: 197,102.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    281,107.72 : 421,800.12 = 131,358.34 : x
  2. Step 2: Convert to fraction form
    281,107.72/421,800.12 = 131,358.34/x
  3. Step 3: Cross multiply
    281,107.72x = 421,800.12 × 131,358.34
  4. Step 4: Simplify right side
    281,107.72x = 55,406,963,575.00
  5. Step 5: Solve for x
    x = 55,406,963,575.00/281,107.72
  6. Step 6: Final answer
    x = 197,102.25

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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.