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Finding the Fourth Proportional to 203,449.50, 280,763.69 and 112,809.29

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Solution

The fourth proportional to 203,449.50, 280,763.69 and 112,809.29 is: 155,678.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,449.50 : 280,763.69 = 112,809.29 : x
  2. Step 2: Convert to fraction form
    203,449.50/280,763.69 = 112,809.29/x
  3. Step 3: Cross multiply
    203,449.50x = 280,763.69 × 112,809.29
  4. Step 4: Simplify right side
    203,449.50x = 31,672,750,558.82
  5. Step 5: Solve for x
    x = 31,672,750,558.82/203,449.50
  6. Step 6: Final answer
    x = 155,678.68

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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.