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Finding the Fourth Proportional to 203,306.34, 280,539.72 and 112,639.50

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Solution

The fourth proportional to 203,306.34, 280,539.72 and 112,639.50 is: 155,429.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,306.34 : 280,539.72 = 112,639.50 : x
  2. Step 2: Convert to fraction form
    203,306.34/280,539.72 = 112,639.50/x
  3. Step 3: Cross multiply
    203,306.34x = 280,539.72 × 112,639.50
  4. Step 4: Simplify right side
    203,306.34x = 31,599,853,790.94
  5. Step 5: Solve for x
    x = 31,599,853,790.94/203,306.34
  6. Step 6: Final answer
    x = 155,429.75

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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.