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Finding the Fourth Proportional to 72,113, 108,169.60 and 18,804.94

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Solution

The fourth proportional to 72,113, 108,169.60 and 18,804.94 is: 28,207.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,113 : 108,169.60 = 18,804.94 : x
  2. Step 2: Convert to fraction form
    72,113/108,169.60 = 18,804.94/x
  3. Step 3: Cross multiply
    72,113x = 108,169.60 × 18,804.94
  4. Step 4: Simplify right side
    72,113x = 2,034,122,837.82
  5. Step 5: Solve for x
    x = 2,034,122,837.82/72,113
  6. Step 6: Final answer
    x = 28,207.44

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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.