Home / 135,939.39-187,554.03-78,557.81

Finding the Fourth Proportional to 135,939.39, 187,554.03 and 78,557.81

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Solution

The fourth proportional to 135,939.39, 187,554.03 and 78,557.81 is: 108,385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,939.39 : 187,554.03 = 78,557.81 : x
  2. Step 2: Convert to fraction form
    135,939.39/187,554.03 = 78,557.81/x
  3. Step 3: Cross multiply
    135,939.39x = 187,554.03 × 78,557.81
  4. Step 4: Simplify right side
    135,939.39x = 14,733,832,915.70
  5. Step 5: Solve for x
    x = 14,733,832,915.70/135,939.39
  6. Step 6: Final answer
    x = 108,385.31

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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.