Home / 136,330.70-188,087.67-78,938.69

Finding the Fourth Proportional to 136,330.70, 188,087.67 and 78,938.69

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Solution

The fourth proportional to 136,330.70, 188,087.67 and 78,938.69 is: 108,907.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,330.70 : 188,087.67 = 78,938.69 : x
  2. Step 2: Convert to fraction form
    136,330.70/188,087.67 = 78,938.69/x
  3. Step 3: Cross multiply
    136,330.70x = 188,087.67 × 78,938.69
  4. Step 4: Simplify right side
    136,330.70x = 14,847,394,449.15
  5. Step 5: Solve for x
    x = 14,847,394,449.15/136,330.70
  6. Step 6: Final answer
    x = 108,907.20

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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.