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Finding the Fourth Proportional to 198,866.24, 298,228.32 and 65,721.92

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Solution

The fourth proportional to 198,866.24, 298,228.32 and 65,721.92 is: 98,559.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,866.24 : 298,228.32 = 65,721.92 : x
  2. Step 2: Convert to fraction form
    198,866.24/298,228.32 = 65,721.92/x
  3. Step 3: Cross multiply
    198,866.24x = 298,228.32 × 65,721.92
  4. Step 4: Simplify right side
    198,866.24x = 19,600,137,788.77
  5. Step 5: Solve for x
    x = 19,600,137,788.77/198,866.24
  6. Step 6: Final answer
    x = 98,559.40

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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.