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Finding the Fourth Proportional to 200,518.90, 300,778.35 and 129,660.10

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Solution

The fourth proportional to 200,518.90, 300,778.35 and 129,660.10 is: 194,490.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    200,518.90 : 300,778.35 = 129,660.10 : x
  2. Step 2: Convert to fraction form
    200,518.90/300,778.35 = 129,660.10/x
  3. Step 3: Cross multiply
    200,518.90x = 300,778.35 × 129,660.10
  4. Step 4: Simplify right side
    200,518.90x = 38,998,950,938.84
  5. Step 5: Solve for x
    x = 38,998,950,938.84/200,518.90
  6. Step 6: Final answer
    x = 194,490.15

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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.