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Finding the Fourth Proportional to 265,543.72, 398,293.74 and 87,992.68

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Solution

The fourth proportional to 265,543.72, 398,293.74 and 87,992.68 is: 131,981.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,543.72 : 398,293.74 = 87,992.68 : x
  2. Step 2: Convert to fraction form
    265,543.72/398,293.74 = 87,992.68/x
  3. Step 3: Cross multiply
    265,543.72x = 398,293.74 × 87,992.68
  4. Step 4: Simplify right side
    265,543.72x = 35,046,933,609.82
  5. Step 5: Solve for x
    x = 35,046,933,609.82/265,543.72
  6. Step 6: Final answer
    x = 131,981.78

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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.