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Finding the Fourth Proportional to 87,134.42, 130,111.42 and 69,163.46

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Solution

The fourth proportional to 87,134.42, 130,111.42 and 69,163.46 is: 103,276.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    87,134.42 : 130,111.42 = 69,163.46 : x
  2. Step 2: Convert to fraction form
    87,134.42/130,111.42 = 69,163.46/x
  3. Step 3: Cross multiply
    87,134.42x = 130,111.42 × 69,163.46
  4. Step 4: Simplify right side
    87,134.42x = 8,998,954,996.34
  5. Step 5: Solve for x
    x = 8,998,954,996.34/87,134.42
  6. Step 6: Final answer
    x = 103,276.70

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.