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Finding the Fourth Proportional to 201,913.40, 302,870.10 and 68,761.55

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Solution

The fourth proportional to 201,913.40, 302,870.10 and 68,761.55 is: 103,142.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    201,913.40 : 302,870.10 = 68,761.55 : x
  2. Step 2: Convert to fraction form
    201,913.40/302,870.10 = 68,761.55/x
  3. Step 3: Cross multiply
    201,913.40x = 302,870.10 × 68,761.55
  4. Step 4: Simplify right side
    201,913.40x = 20,825,817,524.66
  5. Step 5: Solve for x
    x = 20,825,817,524.66/201,913.40
  6. Step 6: Final answer
    x = 103,142.33

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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.