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Finding the Fourth Proportional to 66,244.13, 91,416 and 36,028.80

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Solution

The fourth proportional to 66,244.13, 91,416 and 36,028.80 is: 49,719.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,244.13 : 91,416 = 36,028.80 : x
  2. Step 2: Convert to fraction form
    66,244.13/91,416 = 36,028.80/x
  3. Step 3: Cross multiply
    66,244.13x = 91,416 × 36,028.80
  4. Step 4: Simplify right side
    66,244.13x = 3,293,608,780.80
  5. Step 5: Solve for x
    x = 3,293,608,780.80/66,244.13
  6. Step 6: Final answer
    x = 49,719.25

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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.