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Finding the Fourth Proportional to 66,279.60, 91,453.25 and 39,428.91

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Solution

The fourth proportional to 66,279.60, 91,453.25 and 39,428.91 is: 54,404.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    66,279.60 : 91,453.25 = 39,428.91 : x
  2. Step 2: Convert to fraction form
    66,279.60/91,453.25 = 39,428.91/x
  3. Step 3: Cross multiply
    66,279.60x = 91,453.25 × 39,428.91
  4. Step 4: Simplify right side
    66,279.60x = 3,605,902,062.03
  5. Step 5: Solve for x
    x = 3,605,902,062.03/66,279.60
  6. Step 6: Final answer
    x = 54,404.40

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.