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Finding the Fourth Proportional to 245,582.56, 368,435.16 and 85,660.80

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Solution

The fourth proportional to 245,582.56, 368,435.16 and 85,660.80 is: 128,512.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,582.56 : 368,435.16 = 85,660.80 : x
  2. Step 2: Convert to fraction form
    245,582.56/368,435.16 = 85,660.80/x
  3. Step 3: Cross multiply
    245,582.56x = 368,435.16 × 85,660.80
  4. Step 4: Simplify right side
    245,582.56x = 31,560,450,553.73
  5. Step 5: Solve for x
    x = 31,560,450,553.73/245,582.56
  6. Step 6: Final answer
    x = 128,512.59

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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.