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Finding the Fourth Proportional to 121,682.40, 182,912.40 and 86,863.20

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Solution

The fourth proportional to 121,682.40, 182,912.40 and 86,863.20 is: 130,572.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    121,682.40 : 182,912.40 = 86,863.20 : x
  2. Step 2: Convert to fraction form
    121,682.40/182,912.40 = 86,863.20/x
  3. Step 3: Cross multiply
    121,682.40x = 182,912.40 × 86,863.20
  4. Step 4: Simplify right side
    121,682.40x = 15,888,356,383.68
  5. Step 5: Solve for x
    x = 15,888,356,383.68/121,682.40
  6. Step 6: Final answer
    x = 130,572.35

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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.