Home / 72,400.56-108,586.26-19,815.36

Finding the Fourth Proportional to 72,400.56, 108,586.26 and 19,815.36

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Solution

The fourth proportional to 72,400.56, 108,586.26 and 19,815.36 is: 29,719.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,400.56 : 108,586.26 = 19,815.36 : x
  2. Step 2: Convert to fraction form
    72,400.56/108,586.26 = 19,815.36/x
  3. Step 3: Cross multiply
    72,400.56x = 108,586.26 × 19,815.36
  4. Step 4: Simplify right side
    72,400.56x = 2,151,675,832.95
  5. Step 5: Solve for x
    x = 2,151,675,832.95/72,400.56
  6. Step 6: Final answer
    x = 29,719.05

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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.