Home / 72,099.36-108,131.68-19,509.28

Finding the Fourth Proportional to 72,099.36, 108,131.68 and 19,509.28

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Solution

The fourth proportional to 72,099.36, 108,131.68 and 19,509.28 is: 29,259.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,099.36 : 108,131.68 = 19,509.28 : x
  2. Step 2: Convert to fraction form
    72,099.36/108,131.68 = 19,509.28/x
  3. Step 3: Cross multiply
    72,099.36x = 108,131.68 × 19,509.28
  4. Step 4: Simplify right side
    72,099.36x = 2,109,571,221.99
  5. Step 5: Solve for x
    x = 2,109,571,221.99/72,099.36
  6. Step 6: Final answer
    x = 29,259.22

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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.