Home / 72,589.04-108,889.76-19,998.56

Finding the Fourth Proportional to 72,589.04, 108,889.76 and 19,998.56

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Solution

The fourth proportional to 72,589.04, 108,889.76 and 19,998.56 is: 29,999.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,589.04 : 108,889.76 = 19,998.56 : x
  2. Step 2: Convert to fraction form
    72,589.04/108,889.76 = 19,998.56/x
  3. Step 3: Cross multiply
    72,589.04x = 108,889.76 × 19,998.56
  4. Step 4: Simplify right side
    72,589.04x = 2,177,638,398.75
  5. Step 5: Solve for x
    x = 2,177,638,398.75/72,589.04
  6. Step 6: Final answer
    x = 29,999.55

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1.5x scale

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.