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Finding the Fourth Proportional to 121,763.52, 182,682.20 and 86,293.42

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Solution

The fourth proportional to 121,763.52, 182,682.20 and 86,293.42 is: 129,466.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,763.52 : 182,682.20 = 86,293.42 : x
  2. Step 2: Convert to fraction form
    121,763.52/182,682.20 = 86,293.42/x
  3. Step 3: Cross multiply
    121,763.52x = 182,682.20 × 86,293.42
  4. Step 4: Simplify right side
    121,763.52x = 15,764,271,811.12
  5. Step 5: Solve for x
    x = 15,764,271,811.12/121,763.52
  6. Step 6: Final answer
    x = 129,466.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.