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Finding the Fourth Proportional to 72,248.78, 108,362.23 and 19,662.37

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Solution

The fourth proportional to 72,248.78, 108,362.23 and 19,662.37 is: 29,490.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,248.78 : 108,362.23 = 19,662.37 : x
  2. Step 2: Convert to fraction form
    72,248.78/108,362.23 = 19,662.37/x
  3. Step 3: Cross multiply
    72,248.78x = 108,362.23 × 19,662.37
  4. Step 4: Simplify right side
    72,248.78x = 2,130,657,940.22
  5. Step 5: Solve for x
    x = 2,130,657,940.22/72,248.78
  6. Step 6: Final answer
    x = 29,490.57

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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.