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Finding the Fourth Proportional to 172,856.70, 259,285.05 and 154,485.90

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Solution

The fourth proportional to 172,856.70, 259,285.05 and 154,485.90 is: 231,728.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,856.70 : 259,285.05 = 154,485.90 : x
  2. Step 2: Convert to fraction form
    172,856.70/259,285.05 = 154,485.90/x
  3. Step 3: Cross multiply
    172,856.70x = 259,285.05 × 154,485.90
  4. Step 4: Simplify right side
    172,856.70x = 40,055,884,305.80
  5. Step 5: Solve for x
    x = 40,055,884,305.80/172,856.70
  6. Step 6: Final answer
    x = 231,728.85

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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.