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Finding the Fourth Proportional to 203,053.90, 280,126.40 and 122,436.64

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Solution

The fourth proportional to 203,053.90, 280,126.40 and 122,436.64 is: 168,909.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,053.90 : 280,126.40 = 122,436.64 : x
  2. Step 2: Convert to fraction form
    203,053.90/280,126.40 = 122,436.64/x
  3. Step 3: Cross multiply
    203,053.90x = 280,126.40 × 122,436.64
  4. Step 4: Simplify right side
    203,053.90x = 34,297,735,617.98
  5. Step 5: Solve for x
    x = 34,297,735,617.98/203,053.90
  6. Step 6: Final answer
    x = 168,909.51

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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.