Home / 128,440.56-177,256.17-71,852.34

Finding the Fourth Proportional to 128,440.56, 177,256.17 and 71,852.34

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Solution

The fourth proportional to 128,440.56, 177,256.17 and 71,852.34 is: 99,160.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,440.56 : 177,256.17 = 71,852.34 : x
  2. Step 2: Convert to fraction form
    128,440.56/177,256.17 = 71,852.34/x
  3. Step 3: Cross multiply
    128,440.56x = 177,256.17 × 71,852.34
  4. Step 4: Simplify right side
    128,440.56x = 12,736,270,593.94
  5. Step 5: Solve for x
    x = 12,736,270,593.94/128,440.56
  6. Step 6: Final answer
    x = 99,160.81

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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.