Home / 205,307.40-307,917.90-86,982.60

Finding the Fourth Proportional to 205,307.40, 307,917.90 and 86,982.60

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Solution

The fourth proportional to 205,307.40, 307,917.90 and 86,982.60 is: 130,455.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,307.40 : 307,917.90 = 86,982.60 : x
  2. Step 2: Convert to fraction form
    205,307.40/307,917.90 = 86,982.60/x
  3. Step 3: Cross multiply
    205,307.40x = 307,917.90 × 86,982.60
  4. Step 4: Simplify right side
    205,307.40x = 26,783,499,528.54
  5. Step 5: Solve for x
    x = 26,783,499,528.54/205,307.40
  6. Step 6: Final answer
    x = 130,455.60

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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.