Home / 205,831.40-308,615.70-87,441.80

Finding the Fourth Proportional to 205,831.40, 308,615.70 and 87,441.80

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Solution

The fourth proportional to 205,831.40, 308,615.70 and 87,441.80 is: 131,106.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,831.40 : 308,615.70 = 87,441.80 : x
  2. Step 2: Convert to fraction form
    205,831.40/308,615.70 = 87,441.80/x
  3. Step 3: Cross multiply
    205,831.40x = 308,615.70 × 87,441.80
  4. Step 4: Simplify right side
    205,831.40x = 26,985,912,316.26
  5. Step 5: Solve for x
    x = 26,985,912,316.26/205,831.40
  6. Step 6: Final answer
    x = 131,106.88

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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.