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Finding the Fourth Proportional to 203,420.21, 280,736.52 and 112,804.60

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Solution

The fourth proportional to 203,420.21, 280,736.52 and 112,804.60 is: 155,679.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,420.21 : 280,736.52 = 112,804.60 : x
  2. Step 2: Convert to fraction form
    203,420.21/280,736.52 = 112,804.60/x
  3. Step 3: Cross multiply
    203,420.21x = 280,736.52 × 112,804.60
  4. Step 4: Simplify right side
    203,420.21x = 31,668,369,440.31
  5. Step 5: Solve for x
    x = 31,668,369,440.31/203,420.21
  6. Step 6: Final answer
    x = 155,679.56

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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.