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Finding the Fourth Proportional to 203,963.40, 305,840.04 and 91,547.25

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Solution

The fourth proportional to 203,963.40, 305,840.04 and 91,547.25 is: 137,273.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,963.40 : 305,840.04 = 91,547.25 : x
  2. Step 2: Convert to fraction form
    203,963.40/305,840.04 = 91,547.25/x
  3. Step 3: Cross multiply
    203,963.40x = 305,840.04 × 91,547.25
  4. Step 4: Simplify right side
    203,963.40x = 27,998,814,601.89
  5. Step 5: Solve for x
    x = 27,998,814,601.89/203,963.40
  6. Step 6: Final answer
    x = 137,273.72

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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.