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Finding the Fourth Proportional to 85,918.80, 118,568.93 and 47,679.10

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Solution

The fourth proportional to 85,918.80, 118,568.93 and 47,679.10 is: 65,797.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,918.80 : 118,568.93 = 47,679.10 : x
  2. Step 2: Convert to fraction form
    85,918.80/118,568.93 = 47,679.10/x
  3. Step 3: Cross multiply
    85,918.80x = 118,568.93 × 47,679.10
  4. Step 4: Simplify right side
    85,918.80x = 5,653,259,870.36
  5. Step 5: Solve for x
    x = 5,653,259,870.36/85,918.80
  6. Step 6: Final answer
    x = 65,797.71

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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.