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Finding the Fourth Proportional to 172,319.54, 258,520.62 and 83,469.20

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Solution

The fourth proportional to 172,319.54, 258,520.62 and 83,469.20 is: 125,223.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,319.54 : 258,520.62 = 83,469.20 : x
  2. Step 2: Convert to fraction form
    172,319.54/258,520.62 = 83,469.20/x
  3. Step 3: Cross multiply
    172,319.54x = 258,520.62 × 83,469.20
  4. Step 4: Simplify right side
    172,319.54x = 21,578,509,334.90
  5. Step 5: Solve for x
    x = 21,578,509,334.90/172,319.54
  6. Step 6: Final answer
    x = 125,223.81

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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.