Home / 136,310.85-188,119.16-78,965.59

Finding the Fourth Proportional to 136,310.85, 188,119.16 and 78,965.59

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Solution

The fourth proportional to 136,310.85, 188,119.16 and 78,965.59 is: 108,978.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,310.85 : 188,119.16 = 78,965.59 : x
  2. Step 2: Convert to fraction form
    136,310.85/188,119.16 = 78,965.59/x
  3. Step 3: Cross multiply
    136,310.85x = 188,119.16 × 78,965.59
  4. Step 4: Simplify right side
    136,310.85x = 14,854,940,459.70
  5. Step 5: Solve for x
    x = 14,854,940,459.70/136,310.85
  6. Step 6: Final answer
    x = 108,978.42

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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.