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Finding the Fourth Proportional to 203,599.80, 280,969.42 and 112,961.72

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Solution

The fourth proportional to 203,599.80, 280,969.42 and 112,961.72 is: 155,888.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,599.80 : 280,969.42 = 112,961.72 : x
  2. Step 2: Convert to fraction form
    203,599.80/280,969.42 = 112,961.72/x
  3. Step 3: Cross multiply
    203,599.80x = 280,969.42 × 112,961.72
  4. Step 4: Simplify right side
    203,599.80x = 31,738,788,950.60
  5. Step 5: Solve for x
    x = 31,738,788,950.60/203,599.80
  6. Step 6: Final answer
    x = 155,888.11

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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.