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Finding the Fourth Proportional to 245,635.78, 368,453.76 and 87,854.80

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Solution

The fourth proportional to 245,635.78, 368,453.76 and 87,854.80 is: 131,782.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,635.78 : 368,453.76 = 87,854.80 : x
  2. Step 2: Convert to fraction form
    245,635.78/368,453.76 = 87,854.80/x
  3. Step 3: Cross multiply
    245,635.78x = 368,453.76 × 87,854.80
  4. Step 4: Simplify right side
    245,635.78x = 32,370,431,394.05
  5. Step 5: Solve for x
    x = 32,370,431,394.05/245,635.78
  6. Step 6: Final answer
    x = 131,782.23

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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.