Home / 128,827.50-177,721.47-91,122.54

Finding the Fourth Proportional to 128,827.50, 177,721.47 and 91,122.54

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Solution

The fourth proportional to 128,827.50, 177,721.47 and 91,122.54 is: 125,706.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,827.50 : 177,721.47 = 91,122.54 : x
  2. Step 2: Convert to fraction form
    128,827.50/177,721.47 = 91,122.54/x
  3. Step 3: Cross multiply
    128,827.50x = 177,721.47 × 91,122.54
  4. Step 4: Simplify right side
    128,827.50x = 16,194,431,758.93
  5. Step 5: Solve for x
    x = 16,194,431,758.93/128,827.50
  6. Step 6: Final answer
    x = 125,706.33

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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.