Home / 128,724.73-177,625.78-71,362.44

Finding the Fourth Proportional to 128,724.73, 177,625.78 and 71,362.44

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Solution

The fourth proportional to 128,724.73, 177,625.78 and 71,362.44 is: 98,472.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,724.73 : 177,625.78 = 71,362.44 : x
  2. Step 2: Convert to fraction form
    128,724.73/177,625.78 = 71,362.44/x
  3. Step 3: Cross multiply
    128,724.73x = 177,625.78 × 71,362.44
  4. Step 4: Simplify right side
    128,724.73x = 12,675,808,889.30
  5. Step 5: Solve for x
    x = 12,675,808,889.30/128,724.73
  6. Step 6: Final answer
    x = 98,472.21

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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.