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Finding the Fourth Proportional to 104,047.20, 155,725.20 and 72,943.20

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Solution

The fourth proportional to 104,047.20, 155,725.20 and 72,943.20 is: 109,172.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    104,047.20 : 155,725.20 = 72,943.20 : x
  2. Step 2: Convert to fraction form
    104,047.20/155,725.20 = 72,943.20/x
  3. Step 3: Cross multiply
    104,047.20x = 155,725.20 × 72,943.20
  4. Step 4: Simplify right side
    104,047.20x = 11,359,094,408.64
  5. Step 5: Solve for x
    x = 11,359,094,408.64/104,047.20
  6. Step 6: Final answer
    x = 109,172.51

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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.