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Finding the Fourth Proportional to 145,481.66, 200,734.60 and 85,040.61

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Solution

The fourth proportional to 145,481.66, 200,734.60 and 85,040.61 is: 117,338.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,481.66 : 200,734.60 = 85,040.61 : x
  2. Step 2: Convert to fraction form
    145,481.66/200,734.60 = 85,040.61/x
  3. Step 3: Cross multiply
    145,481.66x = 200,734.60 × 85,040.61
  4. Step 4: Simplify right side
    145,481.66x = 17,070,592,406.90
  5. Step 5: Solve for x
    x = 17,070,592,406.90/145,481.66
  6. Step 6: Final answer
    x = 117,338.45

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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.