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Finding the Fourth Proportional to 203,221.76, 280,445.99 and 112,583.61

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Solution

The fourth proportional to 203,221.76, 280,445.99 and 112,583.61 is: 155,365.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,221.76 : 280,445.99 = 112,583.61 : x
  2. Step 2: Convert to fraction form
    203,221.76/280,445.99 = 112,583.61/x
  3. Step 3: Cross multiply
    203,221.76x = 280,445.99 × 112,583.61
  4. Step 4: Simplify right side
    203,221.76x = 31,573,621,401.31
  5. Step 5: Solve for x
    x = 31,573,621,401.31/203,221.76
  6. Step 6: Final answer
    x = 155,365.36

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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.