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Finding the Fourth Proportional to 200,086.20, 300,056.40 and 66,970.80

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Solution

The fourth proportional to 200,086.20, 300,056.40 and 66,970.80 is: 100,431.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,086.20 : 300,056.40 = 66,970.80 : x
  2. Step 2: Convert to fraction form
    200,086.20/300,056.40 = 66,970.80/x
  3. Step 3: Cross multiply
    200,086.20x = 300,056.40 × 66,970.80
  4. Step 4: Simplify right side
    200,086.20x = 20,095,017,153.12
  5. Step 5: Solve for x
    x = 20,095,017,153.12/200,086.20
  6. Step 6: Final answer
    x = 100,431.80

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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.