Home / 205,484.40-307,996.20-87,135.60

Finding the Fourth Proportional to 205,484.40, 307,996.20 and 87,135.60

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Solution

The fourth proportional to 205,484.40, 307,996.20 and 87,135.60 is: 130,605.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,484.40 : 307,996.20 = 87,135.60 : x
  2. Step 2: Convert to fraction form
    205,484.40/307,996.20 = 87,135.60/x
  3. Step 3: Cross multiply
    205,484.40x = 307,996.20 × 87,135.60
  4. Step 4: Simplify right side
    205,484.40x = 26,837,433,684.72
  5. Step 5: Solve for x
    x = 26,837,433,684.72/205,484.40
  6. Step 6: Final answer
    x = 130,605.70

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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.