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Finding the Fourth Proportional to 65,418.80, 98,128.20 and 58,857.80

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Solution

The fourth proportional to 65,418.80, 98,128.20 and 58,857.80 is: 88,286.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    65,418.80 : 98,128.20 = 58,857.80 : x
  2. Step 2: Convert to fraction form
    65,418.80/98,128.20 = 58,857.80/x
  3. Step 3: Cross multiply
    65,418.80x = 98,128.20 × 58,857.80
  4. Step 4: Simplify right side
    65,418.80x = 5,775,609,969.96
  5. Step 5: Solve for x
    x = 5,775,609,969.96/65,418.80
  6. Step 6: Final answer
    x = 88,286.70

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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.