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Finding the Fourth Proportional to 72,661.63, 100,273.58 and 39,956.62

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Solution

The fourth proportional to 72,661.63, 100,273.58 and 39,956.62 is: 55,140.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,661.63 : 100,273.58 = 39,956.62 : x
  2. Step 2: Convert to fraction form
    72,661.63/100,273.58 = 39,956.62/x
  3. Step 3: Cross multiply
    72,661.63x = 100,273.58 × 39,956.62
  4. Step 4: Simplify right side
    72,661.63x = 4,006,593,181.31
  5. Step 5: Solve for x
    x = 4,006,593,181.31/72,661.63
  6. Step 6: Final answer
    x = 55,140.43

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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.