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Finding the Fourth Proportional to 172,830.90, 259,163.72 and 88,631.40

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Solution

The fourth proportional to 172,830.90, 259,163.72 and 88,631.40 is: 132,904.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,830.90 : 259,163.72 = 88,631.40 : x
  2. Step 2: Convert to fraction form
    172,830.90/259,163.72 = 88,631.40/x
  3. Step 3: Cross multiply
    172,830.90x = 259,163.72 × 88,631.40
  4. Step 4: Simplify right side
    172,830.90x = 22,970,043,332.81
  5. Step 5: Solve for x
    x = 22,970,043,332.81/172,830.90
  6. Step 6: Final answer
    x = 132,904.73

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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.