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Finding the Fourth Proportional to 139,006.98, 206,722.20 and 134,578.30

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Solution

The fourth proportional to 139,006.98, 206,722.20 and 134,578.30 is: 200,136.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,006.98 : 206,722.20 = 134,578.30 : x
  2. Step 2: Convert to fraction form
    139,006.98/206,722.20 = 134,578.30/x
  3. Step 3: Cross multiply
    139,006.98x = 206,722.20 × 134,578.30
  4. Step 4: Simplify right side
    139,006.98x = 27,820,322,248.26
  5. Step 5: Solve for x
    x = 27,820,322,248.26/139,006.98
  6. Step 6: Final answer
    x = 200,136.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.