Home / 136,179.72-187,914.82-78,807.64

Finding the Fourth Proportional to 136,179.72, 187,914.82 and 78,807.64

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Solution

The fourth proportional to 136,179.72, 187,914.82 and 78,807.64 is: 108,746.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,179.72 : 187,914.82 = 78,807.64 : x
  2. Step 2: Convert to fraction form
    136,179.72/187,914.82 = 78,807.64/x
  3. Step 3: Cross multiply
    136,179.72x = 187,914.82 × 78,807.64
  4. Step 4: Simplify right side
    136,179.72x = 14,809,123,485.22
  5. Step 5: Solve for x
    x = 14,809,123,485.22/136,179.72
  6. Step 6: Final answer
    x = 108,746.91

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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.