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Finding the Fourth Proportional to 201,645.90, 302,320.44 and 68,490.36

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Solution

The fourth proportional to 201,645.90, 302,320.44 and 68,490.36 is: 102,685.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,645.90 : 302,320.44 = 68,490.36 : x
  2. Step 2: Convert to fraction form
    201,645.90/302,320.44 = 68,490.36/x
  3. Step 3: Cross multiply
    201,645.90x = 302,320.44 × 68,490.36
  4. Step 4: Simplify right side
    201,645.90x = 20,706,035,770.96
  5. Step 5: Solve for x
    x = 20,706,035,770.96/201,645.90
  6. Step 6: Final answer
    x = 102,685.13

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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.