Home / 129,590.61-178,836.83-72,228.33

Finding the Fourth Proportional to 129,590.61, 178,836.83 and 72,228.33

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Solution

The fourth proportional to 129,590.61, 178,836.83 and 72,228.33 is: 99,676.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,590.61 : 178,836.83 = 72,228.33 : x
  2. Step 2: Convert to fraction form
    129,590.61/178,836.83 = 72,228.33/x
  3. Step 3: Cross multiply
    129,590.61x = 178,836.83 × 72,228.33
  4. Step 4: Simplify right side
    129,590.61x = 12,917,085,573.39
  5. Step 5: Solve for x
    x = 12,917,085,573.39/129,590.61
  6. Step 6: Final answer
    x = 99,676.09

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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.