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Finding the Fourth Proportional to 200,909.40, 301,709.70 and 142,157.40

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Solution

The fourth proportional to 200,909.40, 301,709.70 and 142,157.40 is: 213,480.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,909.40 : 301,709.70 = 142,157.40 : x
  2. Step 2: Convert to fraction form
    200,909.40/301,709.70 = 142,157.40/x
  3. Step 3: Cross multiply
    200,909.40x = 301,709.70 × 142,157.40
  4. Step 4: Simplify right side
    200,909.40x = 42,890,266,506.78
  5. Step 5: Solve for x
    x = 42,890,266,506.78/200,909.40
  6. Step 6: Final answer
    x = 213,480.64

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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.