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Finding the Fourth Proportional to 66,987.85, 92,424.29 and 43,128.33

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Solution

The fourth proportional to 66,987.85, 92,424.29 and 43,128.33 is: 59,504.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,987.85 : 92,424.29 = 43,128.33 : x
  2. Step 2: Convert to fraction form
    66,987.85/92,424.29 = 43,128.33/x
  3. Step 3: Cross multiply
    66,987.85x = 92,424.29 × 43,128.33
  4. Step 4: Simplify right side
    66,987.85x = 3,986,105,063.49
  5. Step 5: Solve for x
    x = 3,986,105,063.49/66,987.85
  6. Step 6: Final answer
    x = 59,504.90

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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.