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Finding the Fourth Proportional to 172,969.28, 259,373.28 and 89,840.96

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Solution

The fourth proportional to 172,969.28, 259,373.28 and 89,840.96 is: 134,719.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    172,969.28 : 259,373.28 = 89,840.96 : x
  2. Step 2: Convert to fraction form
    172,969.28/259,373.28 = 89,840.96/x
  3. Step 3: Cross multiply
    172,969.28x = 259,373.28 × 89,840.96
  4. Step 4: Simplify right side
    172,969.28x = 23,302,344,473.55
  5. Step 5: Solve for x
    x = 23,302,344,473.55/172,969.28
  6. Step 6: Final answer
    x = 134,719.56

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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.