Home / 128,460.30-177,251.40-74,725.71

Finding the Fourth Proportional to 128,460.30, 177,251.40 and 74,725.71

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Solution

The fourth proportional to 128,460.30, 177,251.40 and 74,725.71 is: 103,107.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,460.30 : 177,251.40 = 74,725.71 : x
  2. Step 2: Convert to fraction form
    128,460.30/177,251.40 = 74,725.71/x
  3. Step 3: Cross multiply
    128,460.30x = 177,251.40 × 74,725.71
  4. Step 4: Simplify right side
    128,460.30x = 13,245,236,713.49
  5. Step 5: Solve for x
    x = 13,245,236,713.49/128,460.30
  6. Step 6: Final answer
    x = 103,107.63

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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.