Home / 136,331.67-188,089.00-78,939.66

Finding the Fourth Proportional to 136,331.67, 188,089.00 and 78,939.66

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Solution

The fourth proportional to 136,331.67, 188,089.00 and 78,939.66 is: 108,908.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,331.67 : 188,089.00 = 78,939.66 : x
  2. Step 2: Convert to fraction form
    136,331.67/188,089.00 = 78,939.66/x
  3. Step 3: Cross multiply
    136,331.67x = 188,089.00 × 78,939.66
  4. Step 4: Simplify right side
    136,331.67x = 14,847,681,315.04
  5. Step 5: Solve for x
    x = 14,847,681,315.04/136,331.67
  6. Step 6: Final answer
    x = 108,908.53

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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.