Home / 138,774.96-191,502.09-81,406.35

Finding the Fourth Proportional to 138,774.96, 191,502.09 and 81,406.35

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Solution

The fourth proportional to 138,774.96, 191,502.09 and 81,406.35 is: 112,336.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,774.96 : 191,502.09 = 81,406.35 : x
  2. Step 2: Convert to fraction form
    138,774.96/191,502.09 = 81,406.35/x
  3. Step 3: Cross multiply
    138,774.96x = 191,502.09 × 81,406.35
  4. Step 4: Simplify right side
    138,774.96x = 15,589,486,164.27
  5. Step 5: Solve for x
    x = 15,589,486,164.27/138,774.96
  6. Step 6: Final answer
    x = 112,336.45

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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.