Home / 129,057.03-178,100.78-72,467.19

Finding the Fourth Proportional to 129,057.03, 178,100.78 and 72,467.19

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Solution

The fourth proportional to 129,057.03, 178,100.78 and 72,467.19 is: 100,005.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,057.03 : 178,100.78 = 72,467.19 : x
  2. Step 2: Convert to fraction form
    129,057.03/178,100.78 = 72,467.19/x
  3. Step 3: Cross multiply
    129,057.03x = 178,100.78 × 72,467.19
  4. Step 4: Simplify right side
    129,057.03x = 12,906,462,701.07
  5. Step 5: Solve for x
    x = 12,906,462,701.07/129,057.03
  6. Step 6: Final answer
    x = 100,005.89

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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.