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Finding the Fourth Proportional to 66,740.52, 92,100.52 and 39,889

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Solution

The fourth proportional to 66,740.52, 92,100.52 and 39,889 is: 55,045.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,740.52 : 92,100.52 = 39,889 : x
  2. Step 2: Convert to fraction form
    66,740.52/92,100.52 = 39,889/x
  3. Step 3: Cross multiply
    66,740.52x = 92,100.52 × 39,889
  4. Step 4: Simplify right side
    66,740.52x = 3,673,797,642.28
  5. Step 5: Solve for x
    x = 3,673,797,642.28/66,740.52
  6. Step 6: Final answer
    x = 55,045.98

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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.