Home / 205,815.60-309,040.20-112,503.60

Finding the Fourth Proportional to 205,815.60, 309,040.20 and 112,503.60

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Solution

The fourth proportional to 205,815.60, 309,040.20 and 112,503.60 is: 168,928.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,815.60 : 309,040.20 = 112,503.60 : x
  2. Step 2: Convert to fraction form
    205,815.60/309,040.20 = 112,503.60/x
  3. Step 3: Cross multiply
    205,815.60x = 309,040.20 × 112,503.60
  4. Step 4: Simplify right side
    205,815.60x = 34,768,135,044.72
  5. Step 5: Solve for x
    x = 34,768,135,044.72/205,815.60
  6. Step 6: Final answer
    x = 168,928.57

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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.