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Finding the Fourth Proportional to 72,362.25, 108,540.02 and 19,771.58

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Solution

The fourth proportional to 72,362.25, 108,540.02 and 19,771.58 is: 29,656.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,362.25 : 108,540.02 = 19,771.58 : x
  2. Step 2: Convert to fraction form
    72,362.25/108,540.02 = 19,771.58/x
  3. Step 3: Cross multiply
    72,362.25x = 108,540.02 × 19,771.58
  4. Step 4: Simplify right side
    72,362.25x = 2,146,007,047.07
  5. Step 5: Solve for x
    x = 2,146,007,047.07/72,362.25
  6. Step 6: Final answer
    x = 29,656.44

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.