Home / 129,067.48-178,035.94-81,237.80

Finding the Fourth Proportional to 129,067.48, 178,035.94 and 81,237.80

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Solution

The fourth proportional to 129,067.48, 178,035.94 and 81,237.80 is: 112,059.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,067.48 : 178,035.94 = 81,237.80 : x
  2. Step 2: Convert to fraction form
    129,067.48/178,035.94 = 81,237.80/x
  3. Step 3: Cross multiply
    129,067.48x = 178,035.94 × 81,237.80
  4. Step 4: Simplify right side
    129,067.48x = 14,463,248,086.53
  5. Step 5: Solve for x
    x = 14,463,248,086.53/129,067.48
  6. Step 6: Final answer
    x = 112,059.58

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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.