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Finding the Fourth Proportional to 72,168.02, 108,243.90 and 19,581.60

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Solution

The fourth proportional to 72,168.02, 108,243.90 and 19,581.60 is: 29,370.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,168.02 : 108,243.90 = 19,581.60 : x
  2. Step 2: Convert to fraction form
    72,168.02/108,243.90 = 19,581.60/x
  3. Step 3: Cross multiply
    72,168.02x = 108,243.90 × 19,581.60
  4. Step 4: Simplify right side
    72,168.02x = 2,119,588,752.24
  5. Step 5: Solve for x
    x = 2,119,588,752.24/72,168.02
  6. Step 6: Final answer
    x = 29,370.19

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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.