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Finding the Fourth Proportional to 150,004.78, 225,069.30 and 65,721.40

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Solution

The fourth proportional to 150,004.78, 225,069.30 and 65,721.40 is: 98,609.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    150,004.78 : 225,069.30 = 65,721.40 : x
  2. Step 2: Convert to fraction form
    150,004.78/225,069.30 = 65,721.40/x
  3. Step 3: Cross multiply
    150,004.78x = 225,069.30 × 65,721.40
  4. Step 4: Simplify right side
    150,004.78x = 14,791,869,493.02
  5. Step 5: Solve for x
    x = 14,791,869,493.02/150,004.78
  6. Step 6: Final answer
    x = 98,609.32

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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.