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Finding the Fourth Proportional to 203,559.30, 305,338.95 and 85,364.10

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Solution

The fourth proportional to 203,559.30, 305,338.95 and 85,364.10 is: 128,046.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,559.30 : 305,338.95 = 85,364.10 : x
  2. Step 2: Convert to fraction form
    203,559.30/305,338.95 = 85,364.10/x
  3. Step 3: Cross multiply
    203,559.30x = 305,338.95 × 85,364.10
  4. Step 4: Simplify right side
    203,559.30x = 26,064,984,661.70
  5. Step 5: Solve for x
    x = 26,064,984,661.70/203,559.30
  6. Step 6: Final answer
    x = 128,046.15

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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.