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Finding the Fourth Proportional to 118,989.54, 178,427.28 and 69,083.42

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Solution

The fourth proportional to 118,989.54, 178,427.28 and 69,083.42 is: 103,592.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,989.54 : 178,427.28 = 69,083.42 : x
  2. Step 2: Convert to fraction form
    118,989.54/178,427.28 = 69,083.42/x
  3. Step 3: Cross multiply
    118,989.54x = 178,427.28 × 69,083.42
  4. Step 4: Simplify right side
    118,989.54x = 12,326,366,723.70
  5. Step 5: Solve for x
    x = 12,326,366,723.70/118,989.54
  6. Step 6: Final answer
    x = 103,592.02

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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.