Home / 136,817.18-188,799.78-76,391.65

Finding the Fourth Proportional to 136,817.18, 188,799.78 and 76,391.65

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Solution

The fourth proportional to 136,817.18, 188,799.78 and 76,391.65 is: 105,416.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,817.18 : 188,799.78 = 76,391.65 : x
  2. Step 2: Convert to fraction form
    136,817.18/188,799.78 = 76,391.65/x
  3. Step 3: Cross multiply
    136,817.18x = 188,799.78 × 76,391.65
  4. Step 4: Simplify right side
    136,817.18x = 14,422,727,432.37
  5. Step 5: Solve for x
    x = 14,422,727,432.37/136,817.18
  6. Step 6: Final answer
    x = 105,416.05

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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.