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Finding the Fourth Proportional to 64,664.79, 89,249.69 and 40,476.98

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Solution

The fourth proportional to 64,664.79, 89,249.69 and 40,476.98 is: 55,865.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    64,664.79 : 89,249.69 = 40,476.98 : x
  2. Step 2: Convert to fraction form
    64,664.79/89,249.69 = 40,476.98/x
  3. Step 3: Cross multiply
    64,664.79x = 89,249.69 × 40,476.98
  4. Step 4: Simplify right side
    64,664.79x = 3,612,557,917.14
  5. Step 5: Solve for x
    x = 3,612,557,917.14/64,664.79
  6. Step 6: Final answer
    x = 55,865.92

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.