Home / 235,789.36-325,388.40-128,359

Finding the Fourth Proportional to 235,789.36, 325,388.40 and 128,359

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Solution

The fourth proportional to 235,789.36, 325,388.40 and 128,359 is: 177,134.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    235,789.36 : 325,388.40 = 128,359 : x
  2. Step 2: Convert to fraction form
    235,789.36/325,388.40 = 128,359/x
  3. Step 3: Cross multiply
    235,789.36x = 325,388.40 × 128,359
  4. Step 4: Simplify right side
    235,789.36x = 41,766,529,635.60
  5. Step 5: Solve for x
    x = 41,766,529,635.60/235,789.36
  6. Step 6: Final answer
    x = 177,134.92

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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.