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Finding the Fourth Proportional to 200,020.60, 300,030.90 and 66,921.40

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Solution

The fourth proportional to 200,020.60, 300,030.90 and 66,921.40 is: 100,382.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,020.60 : 300,030.90 = 66,921.40 : x
  2. Step 2: Convert to fraction form
    200,020.60/300,030.90 = 66,921.40/x
  3. Step 3: Cross multiply
    200,020.60x = 300,030.90 × 66,921.40
  4. Step 4: Simplify right side
    200,020.60x = 20,078,487,871.26
  5. Step 5: Solve for x
    x = 20,078,487,871.26/200,020.60
  6. Step 6: Final answer
    x = 100,382.10

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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.