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Finding the Fourth Proportional to 203,495.70, 305,243.55 and 85,154.70

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Solution

The fourth proportional to 203,495.70, 305,243.55 and 85,154.70 is: 127,732.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,495.70 : 305,243.55 = 85,154.70 : x
  2. Step 2: Convert to fraction form
    203,495.70/305,243.55 = 85,154.70/x
  3. Step 3: Cross multiply
    203,495.70x = 305,243.55 × 85,154.70
  4. Step 4: Simplify right side
    203,495.70x = 25,992,922,927.19
  5. Step 5: Solve for x
    x = 25,992,922,927.19/203,495.70
  6. Step 6: Final answer
    x = 127,732.05

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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.