Home / 136,178.72-187,913.44-78,806.64

Finding the Fourth Proportional to 136,178.72, 187,913.44 and 78,806.64

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Solution

The fourth proportional to 136,178.72, 187,913.44 and 78,806.64 is: 108,745.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,178.72 : 187,913.44 = 78,806.64 : x
  2. Step 2: Convert to fraction form
    136,178.72/187,913.44 = 78,806.64/x
  3. Step 3: Cross multiply
    136,178.72x = 187,913.44 × 78,806.64
  4. Step 4: Simplify right side
    136,178.72x = 14,808,826,817.24
  5. Step 5: Solve for x
    x = 14,808,826,817.24/136,178.72
  6. Step 6: Final answer
    x = 108,745.53

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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.