Home / 143,490.89-198,063.83-128,356.85

Finding the Fourth Proportional to 143,490.89, 198,063.83 and 128,356.85

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Solution

The fourth proportional to 143,490.89, 198,063.83 and 128,356.85 is: 177,173.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    143,490.89 : 198,063.83 = 128,356.85 : x
  2. Step 2: Convert to fraction form
    143,490.89/198,063.83 = 128,356.85/x
  3. Step 3: Cross multiply
    143,490.89x = 198,063.83 × 128,356.85
  4. Step 4: Simplify right side
    143,490.89x = 25,422,850,133.79
  5. Step 5: Solve for x
    x = 25,422,850,133.79/143,490.89
  6. Step 6: Final answer
    x = 177,173.96

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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.