Home / 90,939.53-125,476.76-55,138.34

Finding the Fourth Proportional to 90,939.53, 125,476.76 and 55,138.34

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Solution

The fourth proportional to 90,939.53, 125,476.76 and 55,138.34 is: 76,078.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    90,939.53 : 125,476.76 = 55,138.34 : x
  2. Step 2: Convert to fraction form
    90,939.53/125,476.76 = 55,138.34/x
  3. Step 3: Cross multiply
    90,939.53x = 125,476.76 × 55,138.34
  4. Step 4: Simplify right side
    90,939.53x = 6,918,580,706.52
  5. Step 5: Solve for x
    x = 6,918,580,706.52/90,939.53
  6. Step 6: Final answer
    x = 76,078.91

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1.5x scale

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.