Home / 136,931.14-188,958.24-76,489.78

Finding the Fourth Proportional to 136,931.14, 188,958.24 and 76,489.78

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Solution

The fourth proportional to 136,931.14, 188,958.24 and 76,489.78 is: 105,552.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,931.14 : 188,958.24 = 76,489.78 : x
  2. Step 2: Convert to fraction form
    136,931.14/188,958.24 = 76,489.78/x
  3. Step 3: Cross multiply
    136,931.14x = 188,958.24 × 76,489.78
  4. Step 4: Simplify right side
    136,931.14x = 14,453,374,206.79
  5. Step 5: Solve for x
    x = 14,453,374,206.79/136,931.14
  6. Step 6: Final answer
    x = 105,552.14

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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.