Home / 136,221.57-187,982.85-78,863.31

Finding the Fourth Proportional to 136,221.57, 187,982.85 and 78,863.31

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Solution

The fourth proportional to 136,221.57, 187,982.85 and 78,863.31 is: 108,829.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,221.57 : 187,982.85 = 78,863.31 : x
  2. Step 2: Convert to fraction form
    136,221.57/187,982.85 = 78,863.31/x
  3. Step 3: Cross multiply
    136,221.57x = 187,982.85 × 78,863.31
  4. Step 4: Simplify right side
    136,221.57x = 14,824,949,774.23
  5. Step 5: Solve for x
    x = 14,824,949,774.23/136,221.57
  6. Step 6: Final answer
    x = 108,829.68

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1.5x scale

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.