Home / 129,090.69-178,161.86-72,502.06

Finding the Fourth Proportional to 129,090.69, 178,161.86 and 72,502.06

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Solution

The fourth proportional to 129,090.69, 178,161.86 and 72,502.06 is: 100,062.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,090.69 : 178,161.86 = 72,502.06 : x
  2. Step 2: Convert to fraction form
    129,090.69/178,161.86 = 72,502.06/x
  3. Step 3: Cross multiply
    129,090.69x = 178,161.86 × 72,502.06
  4. Step 4: Simplify right side
    129,090.69x = 12,917,101,863.43
  5. Step 5: Solve for x
    x = 12,917,101,863.43/129,090.69
  6. Step 6: Final answer
    x = 100,062.23

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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.