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Finding the Fourth Proportional to 170,212.80, 255,319.20 and 134,961.60

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Solution

The fourth proportional to 170,212.80, 255,319.20 and 134,961.60 is: 202,442.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    170,212.80 : 255,319.20 = 134,961.60 : x
  2. Step 2: Convert to fraction form
    170,212.80/255,319.20 = 134,961.60/x
  3. Step 3: Cross multiply
    170,212.80x = 255,319.20 × 134,961.60
  4. Step 4: Simplify right side
    170,212.80x = 34,458,287,742.72
  5. Step 5: Solve for x
    x = 34,458,287,742.72/170,212.80
  6. Step 6: Final answer
    x = 202,442.40

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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.