Home / 128,293.56-177,048.78-71,705.04

Finding the Fourth Proportional to 128,293.56, 177,048.78 and 71,705.04

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Solution

The fourth proportional to 128,293.56, 177,048.78 and 71,705.04 is: 98,955.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,293.56 : 177,048.78 = 71,705.04 : x
  2. Step 2: Convert to fraction form
    128,293.56/177,048.78 = 71,705.04/x
  3. Step 3: Cross multiply
    128,293.56x = 177,048.78 × 71,705.04
  4. Step 4: Simplify right side
    128,293.56x = 12,695,289,851.85
  5. Step 5: Solve for x
    x = 12,695,289,851.85/128,293.56
  6. Step 6: Final answer
    x = 98,955.00

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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.