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Finding the Fourth Proportional to 172,718.89, 259,113.57 and 72,879.10

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Solution

The fourth proportional to 172,718.89, 259,113.57 and 72,879.10 is: 109,333.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,718.89 : 259,113.57 = 72,879.10 : x
  2. Step 2: Convert to fraction form
    172,718.89/259,113.57 = 72,879.10/x
  3. Step 3: Cross multiply
    172,718.89x = 259,113.57 × 72,879.10
  4. Step 4: Simplify right side
    172,718.89x = 18,883,963,779.39
  5. Step 5: Solve for x
    x = 18,883,963,779.39/172,718.89
  6. Step 6: Final answer
    x = 109,333.52

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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.