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Finding the Fourth Proportional to 403,639.54, 605,436.75 and 123,134.74

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Solution

The fourth proportional to 403,639.54, 605,436.75 and 123,134.74 is: 184,695.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,639.54 : 605,436.75 = 123,134.74 : x
  2. Step 2: Convert to fraction form
    403,639.54/605,436.75 = 123,134.74/x
  3. Step 3: Cross multiply
    403,639.54x = 605,436.75 × 123,134.74
  4. Step 4: Simplify right side
    403,639.54x = 74,550,296,797.70
  5. Step 5: Solve for x
    x = 74,550,296,797.70/403,639.54
  6. Step 6: Final answer
    x = 184,695.23

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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.