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Finding the Fourth Proportional to 203,086.80, 304,169.40 and 128,437.20

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Solution

The fourth proportional to 203,086.80, 304,169.40 and 128,437.20 is: 192,364.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,086.80 : 304,169.40 = 128,437.20 : x
  2. Step 2: Convert to fraction form
    203,086.80/304,169.40 = 128,437.20/x
  3. Step 3: Cross multiply
    203,086.80x = 304,169.40 × 128,437.20
  4. Step 4: Simplify right side
    203,086.80x = 39,066,666,061.68
  5. Step 5: Solve for x
    x = 39,066,666,061.68/203,086.80
  6. Step 6: Final answer
    x = 192,364.38

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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.