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Finding the Fourth Proportional to 72,974.02, 100,704.13 and 39,440.02

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Solution

The fourth proportional to 72,974.02, 100,704.13 and 39,440.02 is: 54,427.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,974.02 : 100,704.13 = 39,440.02 : x
  2. Step 2: Convert to fraction form
    72,974.02/100,704.13 = 39,440.02/x
  3. Step 3: Cross multiply
    72,974.02x = 100,704.13 × 39,440.02
  4. Step 4: Simplify right side
    72,974.02x = 3,971,772,901.28
  5. Step 5: Solve for x
    x = 3,971,772,901.28/72,974.02
  6. Step 6: Final answer
    x = 54,427.22

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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.