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Finding the Fourth Proportional to 72,960.68, 100,684.38 and 41,129.60

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Solution

The fourth proportional to 72,960.68, 100,684.38 and 41,129.60 is: 56,758.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,960.68 : 100,684.38 = 41,129.60 : x
  2. Step 2: Convert to fraction form
    72,960.68/100,684.38 = 41,129.60/x
  3. Step 3: Cross multiply
    72,960.68x = 100,684.38 × 41,129.60
  4. Step 4: Simplify right side
    72,960.68x = 4,141,107,772.23
  5. Step 5: Solve for x
    x = 4,141,107,772.23/72,960.68
  6. Step 6: Final answer
    x = 56,758.08

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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.