Home / 138,727.96-191,435.54-78,290.39

Finding the Fourth Proportional to 138,727.96, 191,435.54 and 78,290.39

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Solution

The fourth proportional to 138,727.96, 191,435.54 and 78,290.39 is: 108,035.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,727.96 : 191,435.54 = 78,290.39 : x
  2. Step 2: Convert to fraction form
    138,727.96/191,435.54 = 78,290.39/x
  3. Step 3: Cross multiply
    138,727.96x = 191,435.54 × 78,290.39
  4. Step 4: Simplify right side
    138,727.96x = 14,987,562,405.57
  5. Step 5: Solve for x
    x = 14,987,562,405.57/138,727.96
  6. Step 6: Final answer
    x = 108,035.63

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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.