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Finding the Fourth Proportional to 265,129.10, 397,755.95 and 87,636.12

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Solution

The fourth proportional to 265,129.10, 397,755.95 and 87,636.12 is: 131,474.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,129.10 : 397,755.95 = 87,636.12 : x
  2. Step 2: Convert to fraction form
    265,129.10/397,755.95 = 87,636.12/x
  3. Step 3: Cross multiply
    265,129.10x = 397,755.95 × 87,636.12
  4. Step 4: Simplify right side
    265,129.10x = 34,857,786,732.34
  5. Step 5: Solve for x
    x = 34,857,786,732.34/265,129.10
  6. Step 6: Final answer
    x = 131,474.77

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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.