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Finding the Fourth Proportional to 201,627.78, 302,442.51 and 81,687.05

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Solution

The fourth proportional to 201,627.78, 302,442.51 and 81,687.05 is: 122,530.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,627.78 : 302,442.51 = 81,687.05 : x
  2. Step 2: Convert to fraction form
    201,627.78/302,442.51 = 81,687.05/x
  3. Step 3: Cross multiply
    201,627.78x = 302,442.51 × 81,687.05
  4. Step 4: Simplify right side
    201,627.78x = 24,705,636,436.50
  5. Step 5: Solve for x
    x = 24,705,636,436.50/201,627.78
  6. Step 6: Final answer
    x = 122,530.92

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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.