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Finding the Fourth Proportional to 123,272.01, 184,903.16 and 85,721.49

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Solution

The fourth proportional to 123,272.01, 184,903.16 and 85,721.49 is: 128,578.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    123,272.01 : 184,903.16 = 85,721.49 : x
  2. Step 2: Convert to fraction form
    123,272.01/184,903.16 = 85,721.49/x
  3. Step 3: Cross multiply
    123,272.01x = 184,903.16 × 85,721.49
  4. Step 4: Simplify right side
    123,272.01x = 15,850,173,952.30
  5. Step 5: Solve for x
    x = 15,850,173,952.30/123,272.01
  6. Step 6: Final answer
    x = 128,578.86

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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.