Home / 128,984.36-177,993.28-71,626.64

Finding the Fourth Proportional to 128,984.36, 177,993.28 and 71,626.64

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Solution

The fourth proportional to 128,984.36, 177,993.28 and 71,626.64 is: 98,841.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,984.36 : 177,993.28 = 71,626.64 : x
  2. Step 2: Convert to fraction form
    128,984.36/177,993.28 = 71,626.64/x
  3. Step 3: Cross multiply
    128,984.36x = 177,993.28 × 71,626.64
  4. Step 4: Simplify right side
    128,984.36x = 12,749,060,588.98
  5. Step 5: Solve for x
    x = 12,749,060,588.98/128,984.36
  6. Step 6: Final answer
    x = 98,841.91

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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.