Home / 72,960.12-100,684.80-41,128.78

Finding the Fourth Proportional to 72,960.12, 100,684.80 and 41,128.78

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Solution

The fourth proportional to 72,960.12, 100,684.80 and 41,128.78 is: 56,757.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,960.12 : 100,684.80 = 41,128.78 : x
  2. Step 2: Convert to fraction form
    72,960.12/100,684.80 = 41,128.78/x
  3. Step 3: Cross multiply
    72,960.12x = 100,684.80 × 41,128.78
  4. Step 4: Simplify right side
    72,960.12x = 4,141,042,988.54
  5. Step 5: Solve for x
    x = 4,141,042,988.54/72,960.12
  6. Step 6: Final answer
    x = 56,757.62

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1.5x scale

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.