Home / 128,434.25-177,274.88-74,729.64

Finding the Fourth Proportional to 128,434.25, 177,274.88 and 74,729.64

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Solution

The fourth proportional to 128,434.25, 177,274.88 and 74,729.64 is: 103,147.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,434.25 : 177,274.88 = 74,729.64 : x
  2. Step 2: Convert to fraction form
    128,434.25/177,274.88 = 74,729.64/x
  3. Step 3: Cross multiply
    128,434.25x = 177,274.88 × 74,729.64
  4. Step 4: Simplify right side
    128,434.25x = 13,247,687,589.80
  5. Step 5: Solve for x
    x = 13,247,687,589.80/128,434.25
  6. Step 6: Final answer
    x = 103,147.63

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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.