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Finding the Fourth Proportional to 200,039.80, 300,059.70 and 66,924.40

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Solution

The fourth proportional to 200,039.80, 300,059.70 and 66,924.40 is: 100,386.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,039.80 : 300,059.70 = 66,924.40 : x
  2. Step 2: Convert to fraction form
    200,039.80/300,059.70 = 66,924.40/x
  3. Step 3: Cross multiply
    200,039.80x = 300,059.70 × 66,924.40
  4. Step 4: Simplify right side
    200,039.80x = 20,081,315,386.68
  5. Step 5: Solve for x
    x = 20,081,315,386.68/200,039.80
  6. Step 6: Final answer
    x = 100,386.60

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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.