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Finding the Fourth Proportional to 115,291.65, 159,078.29 and 69,993.48

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Solution

The fourth proportional to 115,291.65, 159,078.29 and 69,993.48 is: 96,576.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    115,291.65 : 159,078.29 = 69,993.48 : x
  2. Step 2: Convert to fraction form
    115,291.65/159,078.29 = 69,993.48/x
  3. Step 3: Cross multiply
    115,291.65x = 159,078.29 × 69,993.48
  4. Step 4: Simplify right side
    115,291.65x = 11,134,442,759.58
  5. Step 5: Solve for x
    x = 11,134,442,759.58/115,291.65
  6. Step 6: Final answer
    x = 96,576.32

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1.5x scale

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.