Home / 172,485.36-258,640.38-78,910.92

Finding the Fourth Proportional to 172,485.36, 258,640.38 and 78,910.92

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Solution

The fourth proportional to 172,485.36, 258,640.38 and 78,910.92 is: 118,326.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,485.36 : 258,640.38 = 78,910.92 : x
  2. Step 2: Convert to fraction form
    172,485.36/258,640.38 = 78,910.92/x
  3. Step 3: Cross multiply
    172,485.36x = 258,640.38 × 78,910.92
  4. Step 4: Simplify right side
    172,485.36x = 20,409,550,334.95
  5. Step 5: Solve for x
    x = 20,409,550,334.95/172,485.36
  6. Step 6: Final answer
    x = 118,326.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.