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Finding the Fourth Proportional to 203,679.30, 305,518.95 and 109,200.90

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Solution

The fourth proportional to 203,679.30, 305,518.95 and 109,200.90 is: 163,801.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,679.30 : 305,518.95 = 109,200.90 : x
  2. Step 2: Convert to fraction form
    203,679.30/305,518.95 = 109,200.90/x
  3. Step 3: Cross multiply
    203,679.30x = 305,518.95 × 109,200.90
  4. Step 4: Simplify right side
    203,679.30x = 33,362,944,307.06
  5. Step 5: Solve for x
    x = 33,362,944,307.06/203,679.30
  6. Step 6: Final answer
    x = 163,801.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.