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Finding the Fourth Proportional to 172,898.16, 258,879.60 and 89,617.20

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Solution

The fourth proportional to 172,898.16, 258,879.60 and 89,617.20 is: 134,183.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,898.16 : 258,879.60 = 89,617.20 : x
  2. Step 2: Convert to fraction form
    172,898.16/258,879.60 = 89,617.20/x
  3. Step 3: Cross multiply
    172,898.16x = 258,879.60 × 89,617.20
  4. Step 4: Simplify right side
    172,898.16x = 23,200,064,889.12
  5. Step 5: Solve for x
    x = 23,200,064,889.12/172,898.16
  6. Step 6: Final answer
    x = 134,183.41

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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.