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Finding the Fourth Proportional to 245,582.57, 368,435.17 and 85,660.82

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Solution

The fourth proportional to 245,582.57, 368,435.17 and 85,660.82 is: 128,512.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,582.57 : 368,435.17 = 85,660.82 : x
  2. Step 2: Convert to fraction form
    245,582.57/368,435.17 = 85,660.82/x
  3. Step 3: Cross multiply
    245,582.57x = 368,435.17 × 85,660.82
  4. Step 4: Simplify right side
    245,582.57x = 31,560,460,016.18
  5. Step 5: Solve for x
    x = 31,560,460,016.18/245,582.57
  6. Step 6: Final answer
    x = 128,512.62

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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.