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Finding the Fourth Proportional to 203,509.15, 305,190.82 and 103,636.15

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Solution

The fourth proportional to 203,509.15, 305,190.82 and 103,636.15 is: 155,417.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,509.15 : 305,190.82 = 103,636.15 : x
  2. Step 2: Convert to fraction form
    203,509.15/305,190.82 = 103,636.15/x
  3. Step 3: Cross multiply
    203,509.15x = 305,190.82 × 103,636.15
  4. Step 4: Simplify right side
    203,509.15x = 31,628,801,600.14
  5. Step 5: Solve for x
    x = 31,628,801,600.14/203,509.15
  6. Step 6: Final answer
    x = 155,417.10

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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.