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Finding the Fourth Proportional to 203,632.78, 281,008.94 and 112,986.80

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Solution

The fourth proportional to 203,632.78, 281,008.94 and 112,986.80 is: 155,919.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,632.78 : 281,008.94 = 112,986.80 : x
  2. Step 2: Convert to fraction form
    203,632.78/281,008.94 = 112,986.80/x
  3. Step 3: Cross multiply
    203,632.78x = 281,008.94 × 112,986.80
  4. Step 4: Simplify right side
    203,632.78x = 31,750,300,901.99
  5. Step 5: Solve for x
    x = 31,750,300,901.99/203,632.78
  6. Step 6: Final answer
    x = 155,919.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.