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Finding the Fourth Proportional to 72,944.36, 100,663.20 and 39,410.36

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Solution

The fourth proportional to 72,944.36, 100,663.20 and 39,410.36 is: 54,386.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,944.36 : 100,663.20 = 39,410.36 : x
  2. Step 2: Convert to fraction form
    72,944.36/100,663.20 = 39,410.36/x
  3. Step 3: Cross multiply
    72,944.36x = 100,663.20 × 39,410.36
  4. Step 4: Simplify right side
    72,944.36x = 3,967,172,950.75
  5. Step 5: Solve for x
    x = 3,967,172,950.75/72,944.36
  6. Step 6: Final answer
    x = 54,386.29

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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.