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Finding the Fourth Proportional to 72,143.60, 108,203.16 and 19,549.04

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Solution

The fourth proportional to 72,143.60, 108,203.16 and 19,549.04 is: 29,320.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    72,143.60 : 108,203.16 = 19,549.04 : x
  2. Step 2: Convert to fraction form
    72,143.60/108,203.16 = 19,549.04/x
  3. Step 3: Cross multiply
    72,143.60x = 108,203.16 × 19,549.04
  4. Step 4: Simplify right side
    72,143.60x = 2,115,267,902.97
  5. Step 5: Solve for x
    x = 2,115,267,902.97/72,143.60
  6. Step 6: Final answer
    x = 29,320.24

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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.