Home / 205,615.30-308,313.60-87,152.80

Finding the Fourth Proportional to 205,615.30, 308,313.60 and 87,152.80

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Solution

The fourth proportional to 205,615.30, 308,313.60 and 87,152.80 is: 130,682.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,615.30 : 308,313.60 = 87,152.80 : x
  2. Step 2: Convert to fraction form
    205,615.30/308,313.60 = 87,152.80/x
  3. Step 3: Cross multiply
    205,615.30x = 308,313.60 × 87,152.80
  4. Step 4: Simplify right side
    205,615.30x = 26,870,393,518.08
  5. Step 5: Solve for x
    x = 26,870,393,518.08/205,615.30
  6. Step 6: Final answer
    x = 130,682.85

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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.