Home / 85,823.30-128,540.55-50,831.30

Finding the Fourth Proportional to 85,823.30, 128,540.55 and 50,831.30

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Solution

The fourth proportional to 85,823.30, 128,540.55 and 50,831.30 is: 76,131.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    85,823.30 : 128,540.55 = 50,831.30 : x
  2. Step 2: Convert to fraction form
    85,823.30/128,540.55 = 50,831.30/x
  3. Step 3: Cross multiply
    85,823.30x = 128,540.55 × 50,831.30
  4. Step 4: Simplify right side
    85,823.30x = 6,533,883,259.22
  5. Step 5: Solve for x
    x = 6,533,883,259.22/85,823.30
  6. Step 6: Final answer
    x = 76,131.81

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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.