Home / 138,600.06-191,268.06-78,170.58

Finding the Fourth Proportional to 138,600.06, 191,268.06 and 78,170.58

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Solution

The fourth proportional to 138,600.06, 191,268.06 and 78,170.58 is: 107,875.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,600.06 : 191,268.06 = 78,170.58 : x
  2. Step 2: Convert to fraction form
    138,600.06/191,268.06 = 78,170.58/x
  3. Step 3: Cross multiply
    138,600.06x = 191,268.06 × 78,170.58
  4. Step 4: Simplify right side
    138,600.06x = 14,951,535,185.67
  5. Step 5: Solve for x
    x = 14,951,535,185.67/138,600.06
  6. Step 6: Final answer
    x = 107,875.39

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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.