Home / 128,512.04-177,339.66-71,912.48

Finding the Fourth Proportional to 128,512.04, 177,339.66 and 71,912.48

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Solution

The fourth proportional to 128,512.04, 177,339.66 and 71,912.48 is: 99,235.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,512.04 : 177,339.66 = 71,912.48 : x
  2. Step 2: Convert to fraction form
    128,512.04/177,339.66 = 71,912.48/x
  3. Step 3: Cross multiply
    128,512.04x = 177,339.66 × 71,912.48
  4. Step 4: Simplify right side
    128,512.04x = 12,752,934,752.96
  5. Step 5: Solve for x
    x = 12,752,934,752.96/128,512.04
  6. Step 6: Final answer
    x = 99,235.33

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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.