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Finding the Fourth Proportional to 72,224.19, 99,672.36 and 39,958.30

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Solution

The fourth proportional to 72,224.19, 99,672.36 and 39,958.30 is: 55,144.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,224.19 : 99,672.36 = 39,958.30 : x
  2. Step 2: Convert to fraction form
    72,224.19/99,672.36 = 39,958.30/x
  3. Step 3: Cross multiply
    72,224.19x = 99,672.36 × 39,958.30
  4. Step 4: Simplify right side
    72,224.19x = 3,982,738,062.59
  5. Step 5: Solve for x
    x = 3,982,738,062.59/72,224.19
  6. Step 6: Final answer
    x = 55,144.10

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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.