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Finding the Fourth Proportional to 200,007.10, 300,010.65 and 66,907.90

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Solution

The fourth proportional to 200,007.10, 300,010.65 and 66,907.90 is: 100,361.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,007.10 : 300,010.65 = 66,907.90 : x
  2. Step 2: Convert to fraction form
    200,007.10/300,010.65 = 66,907.90/x
  3. Step 3: Cross multiply
    200,007.10x = 300,010.65 × 66,907.90
  4. Step 4: Simplify right side
    200,007.10x = 20,073,082,569.14
  5. Step 5: Solve for x
    x = 20,073,082,569.14/200,007.10
  6. Step 6: Final answer
    x = 100,361.85

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1.5x scale

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.