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Finding the Fourth Proportional to 72,112.57, 108,168.93 and 18,804.50

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Solution

The fourth proportional to 72,112.57, 108,168.93 and 18,804.50 is: 28,206.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,112.57 : 108,168.93 = 18,804.50 : x
  2. Step 2: Convert to fraction form
    72,112.57/108,168.93 = 18,804.50/x
  3. Step 3: Cross multiply
    72,112.57x = 108,168.93 × 18,804.50
  4. Step 4: Simplify right side
    72,112.57x = 2,034,062,644.19
  5. Step 5: Solve for x
    x = 2,034,062,644.19/72,112.57
  6. Step 6: Final answer
    x = 28,206.77

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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.