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Finding the Fourth Proportional to 203,085.80, 304,167.90 and 128,436.20

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Solution

The fourth proportional to 203,085.80, 304,167.90 and 128,436.20 is: 192,362.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,085.80 : 304,167.90 = 128,436.20 : x
  2. Step 2: Convert to fraction form
    203,085.80/304,167.90 = 128,436.20/x
  3. Step 3: Cross multiply
    203,085.80x = 304,167.90 × 128,436.20
  4. Step 4: Simplify right side
    203,085.80x = 39,066,169,237.98
  5. Step 5: Solve for x
    x = 39,066,169,237.98/203,085.80
  6. Step 6: Final answer
    x = 192,362.88

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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.