Home / 128,288.35-177,046.59-74,573.20

Finding the Fourth Proportional to 128,288.35, 177,046.59 and 74,573.20

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Solution

The fourth proportional to 128,288.35, 177,046.59 and 74,573.20 is: 102,916.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,288.35 : 177,046.59 = 74,573.20 : x
  2. Step 2: Convert to fraction form
    128,288.35/177,046.59 = 74,573.20/x
  3. Step 3: Cross multiply
    128,288.35x = 177,046.59 × 74,573.20
  4. Step 4: Simplify right side
    128,288.35x = 13,202,930,765.39
  5. Step 5: Solve for x
    x = 13,202,930,765.39/128,288.35
  6. Step 6: Final answer
    x = 102,916.05

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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.