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Finding the Fourth Proportional to 131,019.39, 180,801.32 and 74,433.87

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Solution

The fourth proportional to 131,019.39, 180,801.32 and 74,433.87 is: 102,715.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,019.39 : 180,801.32 = 74,433.87 : x
  2. Step 2: Convert to fraction form
    131,019.39/180,801.32 = 74,433.87/x
  3. Step 3: Cross multiply
    131,019.39x = 180,801.32 × 74,433.87
  4. Step 4: Simplify right side
    131,019.39x = 13,457,741,576.54
  5. Step 5: Solve for x
    x = 13,457,741,576.54/131,019.39
  6. Step 6: Final answer
    x = 102,715.65

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.