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Finding the Fourth Proportional to 149,607.34, 206,388.60 and 89,144.08

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Solution

The fourth proportional to 149,607.34, 206,388.60 and 89,144.08 is: 122,977.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,607.34 : 206,388.60 = 89,144.08 : x
  2. Step 2: Convert to fraction form
    149,607.34/206,388.60 = 89,144.08/x
  3. Step 3: Cross multiply
    149,607.34x = 206,388.60 × 89,144.08
  4. Step 4: Simplify right side
    149,607.34x = 18,398,321,869.49
  5. Step 5: Solve for x
    x = 18,398,321,869.49/149,607.34
  6. Step 6: Final answer
    x = 122,977.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.