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Finding the Fourth Proportional to 200,570.20, 300,855.30 and 129,711.40

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Solution

The fourth proportional to 200,570.20, 300,855.30 and 129,711.40 is: 194,567.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,570.20 : 300,855.30 = 129,711.40 : x
  2. Step 2: Convert to fraction form
    200,570.20/300,855.30 = 129,711.40/x
  3. Step 3: Cross multiply
    200,570.20x = 300,855.30 × 129,711.40
  4. Step 4: Simplify right side
    200,570.20x = 39,024,362,160.42
  5. Step 5: Solve for x
    x = 39,024,362,160.42/200,570.20
  6. Step 6: Final answer
    x = 194,567.10

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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.