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Finding the Fourth Proportional to 203,709.60, 305,442.90 and 124,880.40

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Solution

The fourth proportional to 203,709.60, 305,442.90 and 124,880.40 is: 187,246.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,709.60 : 305,442.90 = 124,880.40 : x
  2. Step 2: Convert to fraction form
    203,709.60/305,442.90 = 124,880.40/x
  3. Step 3: Cross multiply
    203,709.60x = 305,442.90 × 124,880.40
  4. Step 4: Simplify right side
    203,709.60x = 38,143,831,529.16
  5. Step 5: Solve for x
    x = 38,143,831,529.16/203,709.60
  6. Step 6: Final answer
    x = 187,246.12

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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.