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Finding the Fourth Proportional to 265,542.72, 398,292.24 and 87,991.68

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Solution

The fourth proportional to 265,542.72, 398,292.24 and 87,991.68 is: 131,980.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,542.72 : 398,292.24 = 87,991.68 : x
  2. Step 2: Convert to fraction form
    265,542.72/398,292.24 = 87,991.68/x
  3. Step 3: Cross multiply
    265,542.72x = 398,292.24 × 87,991.68
  4. Step 4: Simplify right side
    265,542.72x = 35,046,403,328.56
  5. Step 5: Solve for x
    x = 35,046,403,328.56/265,542.72
  6. Step 6: Final answer
    x = 131,980.28

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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.