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Finding the Fourth Proportional to 203,267.25, 280,350.85 and 138,788.35

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Solution

The fourth proportional to 203,267.25, 280,350.85 and 138,788.35 is: 191,420.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,267.25 : 280,350.85 = 138,788.35 : x
  2. Step 2: Convert to fraction form
    203,267.25/280,350.85 = 138,788.35/x
  3. Step 3: Cross multiply
    203,267.25x = 280,350.85 × 138,788.35
  4. Step 4: Simplify right side
    203,267.25x = 38,909,431,892.60
  5. Step 5: Solve for x
    x = 38,909,431,892.60/203,267.25
  6. Step 6: Final answer
    x = 191,420.07

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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.