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Finding the Fourth Proportional to 202,958.20, 304,523.70 and 128,135.80

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Solution

The fourth proportional to 202,958.20, 304,523.70 and 128,135.80 is: 192,258.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    202,958.20 : 304,523.70 = 128,135.80 : x
  2. Step 2: Convert to fraction form
    202,958.20/304,523.70 = 128,135.80/x
  3. Step 3: Cross multiply
    202,958.20x = 304,523.70 × 128,135.80
  4. Step 4: Simplify right side
    202,958.20x = 39,020,387,918.46
  5. Step 5: Solve for x
    x = 39,020,387,918.46/202,958.20
  6. Step 6: Final answer
    x = 192,258.25

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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.