Home / 138,665.22-191,341.54-78,232.33

Finding the Fourth Proportional to 138,665.22, 191,341.54 and 78,232.33

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Solution

The fourth proportional to 138,665.22, 191,341.54 and 78,232.33 is: 107,951.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,665.22 : 191,341.54 = 78,232.33 : x
  2. Step 2: Convert to fraction form
    138,665.22/191,341.54 = 78,232.33/x
  3. Step 3: Cross multiply
    138,665.22x = 191,341.54 × 78,232.33
  4. Step 4: Simplify right side
    138,665.22x = 14,969,094,836.96
  5. Step 5: Solve for x
    x = 14,969,094,836.96/138,665.22
  6. Step 6: Final answer
    x = 107,951.33

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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.