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Finding the Fourth Proportional to 200,140.70, 300,185.12 and 75,465.50

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Solution

The fourth proportional to 200,140.70, 300,185.12 and 75,465.50 is: 113,188.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,140.70 : 300,185.12 = 75,465.50 : x
  2. Step 2: Convert to fraction form
    200,140.70/300,185.12 = 75,465.50/x
  3. Step 3: Cross multiply
    200,140.70x = 300,185.12 × 75,465.50
  4. Step 4: Simplify right side
    200,140.70x = 22,653,620,173.36
  5. Step 5: Solve for x
    x = 22,653,620,173.36/200,140.70
  6. Step 6: Final answer
    x = 113,188.47

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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.