Home / 136,399.55-188,236.61-79,040.81

Finding the Fourth Proportional to 136,399.55, 188,236.61 and 79,040.81

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Solution

The fourth proportional to 136,399.55, 188,236.61 and 79,040.81 is: 109,079.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,399.55 : 188,236.61 = 79,040.81 : x
  2. Step 2: Convert to fraction form
    136,399.55/188,236.61 = 79,040.81/x
  3. Step 3: Cross multiply
    136,399.55x = 188,236.61 × 79,040.81
  4. Step 4: Simplify right side
    136,399.55x = 14,878,374,497.84
  5. Step 5: Solve for x
    x = 14,878,374,497.84/136,399.55
  6. Step 6: Final answer
    x = 109,079.36

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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.