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Finding the Fourth Proportional to 201,415.20, 302,113.20 and 68,282.40

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Solution

The fourth proportional to 201,415.20, 302,113.20 and 68,282.40 is: 102,420.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,415.20 : 302,113.20 = 68,282.40 : x
  2. Step 2: Convert to fraction form
    201,415.20/302,113.20 = 68,282.40/x
  3. Step 3: Cross multiply
    201,415.20x = 302,113.20 × 68,282.40
  4. Step 4: Simplify right side
    201,415.20x = 20,629,014,367.68
  5. Step 5: Solve for x
    x = 20,629,014,367.68/201,415.20
  6. Step 6: Final answer
    x = 102,420.35

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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.