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Finding the Fourth Proportional to 72,812.25, 100,469.97 and 40,980.51

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Solution

The fourth proportional to 72,812.25, 100,469.97 and 40,980.51 is: 56,546.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,812.25 : 100,469.97 = 40,980.51 : x
  2. Step 2: Convert to fraction form
    72,812.25/100,469.97 = 40,980.51/x
  3. Step 3: Cross multiply
    72,812.25x = 100,469.97 × 40,980.51
  4. Step 4: Simplify right side
    72,812.25x = 4,117,310,610.28
  5. Step 5: Solve for x
    x = 4,117,310,610.28/72,812.25
  6. Step 6: Final answer
    x = 56,546.95

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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.