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Finding the Fourth Proportional to 66,703.87, 92,051.22 and 39,862.09

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Solution

The fourth proportional to 66,703.87, 92,051.22 and 39,862.09 is: 55,009.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,703.87 : 92,051.22 = 39,862.09 : x
  2. Step 2: Convert to fraction form
    66,703.87/92,051.22 = 39,862.09/x
  3. Step 3: Cross multiply
    66,703.87x = 92,051.22 × 39,862.09
  4. Step 4: Simplify right side
    66,703.87x = 3,669,354,016.25
  5. Step 5: Solve for x
    x = 3,669,354,016.25/66,703.87
  6. Step 6: Final answer
    x = 55,009.61

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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.