Home / 128,591.85-177,450.60-71,227.32

Finding the Fourth Proportional to 128,591.85, 177,450.60 and 71,227.32

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Solution

The fourth proportional to 128,591.85, 177,450.60 and 71,227.32 is: 98,290.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,591.85 : 177,450.60 = 71,227.32 : x
  2. Step 2: Convert to fraction form
    128,591.85/177,450.60 = 71,227.32/x
  3. Step 3: Cross multiply
    128,591.85x = 177,450.60 × 71,227.32
  4. Step 4: Simplify right side
    128,591.85x = 12,639,330,670.39
  5. Step 5: Solve for x
    x = 12,639,330,670.39/128,591.85
  6. Step 6: Final answer
    x = 98,290.29

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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.