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Finding the Fourth Proportional to 95,512.80, 143,269.20 and 86,655.45

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Solution

The fourth proportional to 95,512.80, 143,269.20 and 86,655.45 is: 129,983.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    95,512.80 : 143,269.20 = 86,655.45 : x
  2. Step 2: Convert to fraction form
    95,512.80/143,269.20 = 86,655.45/x
  3. Step 3: Cross multiply
    95,512.80x = 143,269.20 × 86,655.45
  4. Step 4: Simplify right side
    95,512.80x = 12,415,056,997.14
  5. Step 5: Solve for x
    x = 12,415,056,997.14/95,512.80
  6. Step 6: Final answer
    x = 129,983.18

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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.