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Finding the Fourth Proportional to 149,034.88, 205,671.72 and 85,392.64

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Solution

The fourth proportional to 149,034.88, 205,671.72 and 85,392.64 is: 117,843.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,034.88 : 205,671.72 = 85,392.64 : x
  2. Step 2: Convert to fraction form
    149,034.88/205,671.72 = 85,392.64/x
  3. Step 3: Cross multiply
    149,034.88x = 205,671.72 × 85,392.64
  4. Step 4: Simplify right side
    149,034.88x = 17,562,851,144.14
  5. Step 5: Solve for x
    x = 17,562,851,144.14/149,034.88
  6. Step 6: Final answer
    x = 117,843.90

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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.