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Finding the Fourth Proportional to 387,761.96, 581,626.46 and 121,516.60

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Solution

The fourth proportional to 387,761.96, 581,626.46 and 121,516.60 is: 182,269.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,761.96 : 581,626.46 = 121,516.60 : x
  2. Step 2: Convert to fraction form
    387,761.96/581,626.46 = 121,516.60/x
  3. Step 3: Cross multiply
    387,761.96x = 581,626.46 × 121,516.60
  4. Step 4: Simplify right side
    387,761.96x = 70,677,269,889.24
  5. Step 5: Solve for x
    x = 70,677,269,889.24/387,761.96
  6. Step 6: Final answer
    x = 182,269.74

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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.