Home / 136,178.22-187,912.75-78,806.15

Finding the Fourth Proportional to 136,178.22, 187,912.75 and 78,806.15

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Solution

The fourth proportional to 136,178.22, 187,912.75 and 78,806.15 is: 108,744.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,178.22 : 187,912.75 = 78,806.15 : x
  2. Step 2: Convert to fraction form
    136,178.22/187,912.75 = 78,806.15/x
  3. Step 3: Cross multiply
    136,178.22x = 187,912.75 × 78,806.15
  4. Step 4: Simplify right side
    136,178.22x = 14,808,679,029.82
  5. Step 5: Solve for x
    x = 14,808,679,029.82/136,178.22
  6. Step 6: Final answer
    x = 108,744.84

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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.