Home / 128,436.06-177,249.96-71,847.84

Finding the Fourth Proportional to 128,436.06, 177,249.96 and 71,847.84

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Solution

The fourth proportional to 128,436.06, 177,249.96 and 71,847.84 is: 99,154.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,436.06 : 177,249.96 = 71,847.84 : x
  2. Step 2: Convert to fraction form
    128,436.06/177,249.96 = 71,847.84/x
  3. Step 3: Cross multiply
    128,436.06x = 177,249.96 × 71,847.84
  4. Step 4: Simplify right side
    128,436.06x = 12,735,026,766.09
  5. Step 5: Solve for x
    x = 12,735,026,766.09/128,436.06
  6. Step 6: Final answer
    x = 99,154.60

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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.