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Finding the Fourth Proportional to 72,195.51, 99,626.88 and 39,928

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Solution

The fourth proportional to 72,195.51, 99,626.88 and 39,928 is: 55,099.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,195.51 : 99,626.88 = 39,928 : x
  2. Step 2: Convert to fraction form
    72,195.51/99,626.88 = 39,928/x
  3. Step 3: Cross multiply
    72,195.51x = 99,626.88 × 39,928
  4. Step 4: Simplify right side
    72,195.51x = 3,977,902,064.64
  5. Step 5: Solve for x
    x = 3,977,902,064.64/72,195.51
  6. Step 6: Final answer
    x = 55,099.03

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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.