Home / 138,526.75-191,166.96-78,910.75

Finding the Fourth Proportional to 138,526.75, 191,166.96 and 78,910.75

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Solution

The fourth proportional to 138,526.75, 191,166.96 and 78,910.75 is: 108,896.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,526.75 : 191,166.96 = 78,910.75 : x
  2. Step 2: Convert to fraction form
    138,526.75/191,166.96 = 78,910.75/x
  3. Step 3: Cross multiply
    138,526.75x = 191,166.96 × 78,910.75
  4. Step 4: Simplify right side
    138,526.75x = 15,085,128,188.82
  5. Step 5: Solve for x
    x = 15,085,128,188.82/138,526.75
  6. Step 6: Final answer
    x = 108,896.86

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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.