Home / 128,540.34-177,340.05-83,750.58

Finding the Fourth Proportional to 128,540.34, 177,340.05 and 83,750.58

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Solution

The fourth proportional to 128,540.34, 177,340.05 and 83,750.58 is: 115,546.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,540.34 : 177,340.05 = 83,750.58 : x
  2. Step 2: Convert to fraction form
    128,540.34/177,340.05 = 83,750.58/x
  3. Step 3: Cross multiply
    128,540.34x = 177,340.05 × 83,750.58
  4. Step 4: Simplify right side
    128,540.34x = 14,852,332,044.73
  5. Step 5: Solve for x
    x = 14,852,332,044.73/128,540.34
  6. Step 6: Final answer
    x = 115,546.08

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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.