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Finding the Fourth Proportional to 163,815.20, 245,730.90 and 85,083.20

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Solution

The fourth proportional to 163,815.20, 245,730.90 and 85,083.20 is: 127,629.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    163,815.20 : 245,730.90 = 85,083.20 : x
  2. Step 2: Convert to fraction form
    163,815.20/245,730.90 = 85,083.20/x
  3. Step 3: Cross multiply
    163,815.20x = 245,730.90 × 85,083.20
  4. Step 4: Simplify right side
    163,815.20x = 20,907,571,310.88
  5. Step 5: Solve for x
    x = 20,907,571,310.88/163,815.20
  6. Step 6: Final answer
    x = 127,629.01

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1.5x scale

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.