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Finding the Fourth Proportional to 305,807.39, 458,675.42 and 81,185.27

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Solution

The fourth proportional to 305,807.39, 458,675.42 and 81,185.27 is: 121,768.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,807.39 : 458,675.42 = 81,185.27 : x
  2. Step 2: Convert to fraction form
    305,807.39/458,675.42 = 81,185.27/x
  3. Step 3: Cross multiply
    305,807.39x = 458,675.42 × 81,185.27
  4. Step 4: Simplify right side
    305,807.39x = 37,237,685,115.76
  5. Step 5: Solve for x
    x = 37,237,685,115.76/305,807.39
  6. Step 6: Final answer
    x = 121,768.43

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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.