Home / 129,463.26-178,633.72-81,781.98

Finding the Fourth Proportional to 129,463.26, 178,633.72 and 81,781.98

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Solution

The fourth proportional to 129,463.26, 178,633.72 and 81,781.98 is: 112,842.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,463.26 : 178,633.72 = 81,781.98 : x
  2. Step 2: Convert to fraction form
    129,463.26/178,633.72 = 81,781.98/x
  3. Step 3: Cross multiply
    129,463.26x = 178,633.72 × 81,781.98
  4. Step 4: Simplify right side
    129,463.26x = 14,609,019,316.37
  5. Step 5: Solve for x
    x = 14,609,019,316.37/129,463.26
  6. Step 6: Final answer
    x = 112,842.97

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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.