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Finding the Fourth Proportional to 203,688.60, 305,123.94 and 103,844.76

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Solution

The fourth proportional to 203,688.60, 305,123.94 and 103,844.76 is: 155,558.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,688.60 : 305,123.94 = 103,844.76 : x
  2. Step 2: Convert to fraction form
    203,688.60/305,123.94 = 103,844.76/x
  3. Step 3: Cross multiply
    203,688.60x = 305,123.94 × 103,844.76
  4. Step 4: Simplify right side
    203,688.60x = 31,685,522,319.55
  5. Step 5: Solve for x
    x = 31,685,522,319.55/203,688.60
  6. Step 6: Final answer
    x = 155,558.64

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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.