Home / 138,666.22-191,342.92-78,233.33

Finding the Fourth Proportional to 138,666.22, 191,342.92 and 78,233.33

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Solution

The fourth proportional to 138,666.22, 191,342.92 and 78,233.33 is: 107,952.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,666.22 : 191,342.92 = 78,233.33 : x
  2. Step 2: Convert to fraction form
    138,666.22/191,342.92 = 78,233.33/x
  3. Step 3: Cross multiply
    138,666.22x = 191,342.92 × 78,233.33
  4. Step 4: Simplify right side
    138,666.22x = 14,969,393,803.52
  5. Step 5: Solve for x
    x = 14,969,393,803.52/138,666.22
  6. Step 6: Final answer
    x = 107,952.71

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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.