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Finding the Fourth Proportional to 66,722.88, 92,068.49 and 39,859.68

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Solution

The fourth proportional to 66,722.88, 92,068.49 and 39,859.68 is: 55,000.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,722.88 : 92,068.49 = 39,859.68 : x
  2. Step 2: Convert to fraction form
    66,722.88/92,068.49 = 39,859.68/x
  3. Step 3: Cross multiply
    66,722.88x = 92,068.49 × 39,859.68
  4. Step 4: Simplify right side
    66,722.88x = 3,669,820,350.18
  5. Step 5: Solve for x
    x = 3,669,820,350.18/66,722.88
  6. Step 6: Final answer
    x = 55,000.93

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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.