Home / 205,664.60-308,612.10-87,315.80

Finding the Fourth Proportional to 205,664.60, 308,612.10 and 87,315.80

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Solution

The fourth proportional to 205,664.60, 308,612.10 and 87,315.80 is: 131,022.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,664.60 : 308,612.10 = 87,315.80 : x
  2. Step 2: Convert to fraction form
    205,664.60/308,612.10 = 87,315.80/x
  3. Step 3: Cross multiply
    205,664.60x = 308,612.10 × 87,315.80
  4. Step 4: Simplify right side
    205,664.60x = 26,946,712,401.18
  5. Step 5: Solve for x
    x = 26,946,712,401.18/205,664.60
  6. Step 6: Final answer
    x = 131,022.61

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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.