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Finding the Fourth Proportional to 72,516.64, 108,725.74 and 36,890.40

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Solution

The fourth proportional to 72,516.64, 108,725.74 and 36,890.40 is: 55,310.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,516.64 : 108,725.74 = 36,890.40 : x
  2. Step 2: Convert to fraction form
    72,516.64/108,725.74 = 36,890.40/x
  3. Step 3: Cross multiply
    72,516.64x = 108,725.74 × 36,890.40
  4. Step 4: Simplify right side
    72,516.64x = 4,010,936,038.90
  5. Step 5: Solve for x
    x = 4,010,936,038.90/72,516.64
  6. Step 6: Final answer
    x = 55,310.56

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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.