Home / 127,920.05-176,561.31-87,151.64

Finding the Fourth Proportional to 127,920.05, 176,561.31 and 87,151.64

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Solution

The fourth proportional to 127,920.05, 176,561.31 and 87,151.64 is: 120,290.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,920.05 : 176,561.31 = 87,151.64 : x
  2. Step 2: Convert to fraction form
    127,920.05/176,561.31 = 87,151.64/x
  3. Step 3: Cross multiply
    127,920.05x = 176,561.31 × 87,151.64
  4. Step 4: Simplify right side
    127,920.05x = 15,387,606,844.24
  5. Step 5: Solve for x
    x = 15,387,606,844.24/127,920.05
  6. Step 6: Final answer
    x = 120,290.82

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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.