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Finding the Fourth Proportional to 203,213.90, 304,492.80 and 128,199.80

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Solution

The fourth proportional to 203,213.90, 304,492.80 and 128,199.80 is: 192,092.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,213.90 : 304,492.80 = 128,199.80 : x
  2. Step 2: Convert to fraction form
    203,213.90/304,492.80 = 128,199.80/x
  3. Step 3: Cross multiply
    203,213.90x = 304,492.80 × 128,199.80
  4. Step 4: Simplify right side
    203,213.90x = 39,035,916,061.44
  5. Step 5: Solve for x
    x = 39,035,916,061.44/203,213.90
  6. Step 6: Final answer
    x = 192,092.75

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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.