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Finding the Fourth Proportional to 119,987.87, 165,578.85 and 66,271.77

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Solution

The fourth proportional to 119,987.87, 165,578.85 and 66,271.77 is: 91,452.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    119,987.87 : 165,578.85 = 66,271.77 : x
  2. Step 2: Convert to fraction form
    119,987.87/165,578.85 = 66,271.77/x
  3. Step 3: Cross multiply
    119,987.87x = 165,578.85 × 66,271.77
  4. Step 4: Simplify right side
    119,987.87x = 10,973,203,464.06
  5. Step 5: Solve for x
    x = 10,973,203,464.06/119,987.87
  6. Step 6: Final answer
    x = 91,452.61

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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.