Home / 138,151.32-190,655.82-81,561.48

Finding the Fourth Proportional to 138,151.32, 190,655.82 and 81,561.48

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Solution

The fourth proportional to 138,151.32, 190,655.82 and 81,561.48 is: 112,558.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,151.32 : 190,655.82 = 81,561.48 : x
  2. Step 2: Convert to fraction form
    138,151.32/190,655.82 = 81,561.48/x
  3. Step 3: Cross multiply
    138,151.32x = 190,655.82 × 81,561.48
  4. Step 4: Simplify right side
    138,151.32x = 15,550,170,849.81
  5. Step 5: Solve for x
    x = 15,550,170,849.81/138,151.32
  6. Step 6: Final answer
    x = 112,558.97

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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.