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Finding the Fourth Proportional to 72,450.59, 108,676.64 and 19,860.08

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Solution

The fourth proportional to 72,450.59, 108,676.64 and 19,860.08 is: 29,790.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,450.59 : 108,676.64 = 19,860.08 : x
  2. Step 2: Convert to fraction form
    72,450.59/108,676.64 = 19,860.08/x
  3. Step 3: Cross multiply
    72,450.59x = 108,676.64 × 19,860.08
  4. Step 4: Simplify right side
    72,450.59x = 2,158,326,121.85
  5. Step 5: Solve for x
    x = 2,158,326,121.85/72,450.59
  6. Step 6: Final answer
    x = 29,790.32

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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.