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Finding the Fourth Proportional to 85,938.60, 118,653.08 and 65,759.44

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Solution

The fourth proportional to 85,938.60, 118,653.08 and 65,759.44 is: 90,792.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,938.60 : 118,653.08 = 65,759.44 : x
  2. Step 2: Convert to fraction form
    85,938.60/118,653.08 = 65,759.44/x
  3. Step 3: Cross multiply
    85,938.60x = 118,653.08 × 65,759.44
  4. Step 4: Simplify right side
    85,938.60x = 7,802,560,095.08
  5. Step 5: Solve for x
    x = 7,802,560,095.08/85,938.60
  6. Step 6: Final answer
    x = 90,792.26

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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.