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Finding the Fourth Proportional to 203,513.55, 280,865.96 and 112,898.72

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Solution

The fourth proportional to 203,513.55, 280,865.96 and 112,898.72 is: 155,809.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,513.55 : 280,865.96 = 112,898.72 : x
  2. Step 2: Convert to fraction form
    203,513.55/280,865.96 = 112,898.72/x
  3. Step 3: Cross multiply
    203,513.55x = 280,865.96 × 112,898.72
  4. Step 4: Simplify right side
    203,513.55x = 31,709,405,406.75
  5. Step 5: Solve for x
    x = 31,709,405,406.75/203,513.55
  6. Step 6: Final answer
    x = 155,809.80

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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.