Home / 128,313.39-177,076.40-71,727.15

Finding the Fourth Proportional to 128,313.39, 177,076.40 and 71,727.15

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Solution

The fourth proportional to 128,313.39, 177,076.40 and 71,727.15 is: 98,985.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,313.39 : 177,076.40 = 71,727.15 : x
  2. Step 2: Convert to fraction form
    128,313.39/177,076.40 = 71,727.15/x
  3. Step 3: Cross multiply
    128,313.39x = 177,076.40 × 71,727.15
  4. Step 4: Simplify right side
    128,313.39x = 12,701,185,145.62
  5. Step 5: Solve for x
    x = 12,701,185,145.62/128,313.39
  6. Step 6: Final answer
    x = 98,985.66

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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.