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Finding the Fourth Proportional to 83,385.54, 125,078.31 and 28,020.42

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Solution

The fourth proportional to 83,385.54, 125,078.31 and 28,020.42 is: 42,030.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    83,385.54 : 125,078.31 = 28,020.42 : x
  2. Step 2: Convert to fraction form
    83,385.54/125,078.31 = 28,020.42/x
  3. Step 3: Cross multiply
    83,385.54x = 125,078.31 × 28,020.42
  4. Step 4: Simplify right side
    83,385.54x = 3,504,746,779.09
  5. Step 5: Solve for x
    x = 3,504,746,779.09/83,385.54
  6. Step 6: Final answer
    x = 42,030.63

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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.