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Finding the Fourth Proportional to 149,137.54, 205,818.66 and 85,479.44

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Solution

The fourth proportional to 149,137.54, 205,818.66 and 85,479.44 is: 117,966.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    149,137.54 : 205,818.66 = 85,479.44 : x
  2. Step 2: Convert to fraction form
    149,137.54/205,818.66 = 85,479.44/x
  3. Step 3: Cross multiply
    149,137.54x = 205,818.66 × 85,479.44
  4. Step 4: Simplify right side
    149,137.54x = 17,593,263,798.35
  5. Step 5: Solve for x
    x = 17,593,263,798.35/149,137.54
  6. Step 6: Final answer
    x = 117,966.70

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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.