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Finding the Fourth Proportional to 265,128.55, 397,755.08 and 87,635.53

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Solution

The fourth proportional to 265,128.55, 397,755.08 and 87,635.53 is: 131,473.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,128.55 : 397,755.08 = 87,635.53 : x
  2. Step 2: Convert to fraction form
    265,128.55/397,755.08 = 87,635.53/x
  3. Step 3: Cross multiply
    265,128.55x = 397,755.08 × 87,635.53
  4. Step 4: Simplify right side
    265,128.55x = 34,857,477,245.99
  5. Step 5: Solve for x
    x = 34,857,477,245.99/265,128.55
  6. Step 6: Final answer
    x = 131,473.87

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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.