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Finding the Fourth Proportional to 203,520.93, 305,204.71 and 85,200.45

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Solution

The fourth proportional to 203,520.93, 305,204.71 and 85,200.45 is: 127,768.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,520.93 : 305,204.71 = 85,200.45 : x
  2. Step 2: Convert to fraction form
    203,520.93/305,204.71 = 85,200.45/x
  3. Step 3: Cross multiply
    203,520.93x = 305,204.71 × 85,200.45
  4. Step 4: Simplify right side
    203,520.93x = 26,003,578,634.12
  5. Step 5: Solve for x
    x = 26,003,578,634.12/203,520.93
  6. Step 6: Final answer
    x = 127,768.57

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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.