Home / 142,129.20-196,131.24-81,657

Finding the Fourth Proportional to 142,129.20, 196,131.24 and 81,657

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Solution

The fourth proportional to 142,129.20, 196,131.24 and 81,657 is: 112,682.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,129.20 : 196,131.24 = 81,657 : x
  2. Step 2: Convert to fraction form
    142,129.20/196,131.24 = 81,657/x
  3. Step 3: Cross multiply
    142,129.20x = 196,131.24 × 81,657
  4. Step 4: Simplify right side
    142,129.20x = 16,015,488,664.68
  5. Step 5: Solve for x
    x = 16,015,488,664.68/142,129.20
  6. Step 6: Final answer
    x = 112,682.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.