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Finding the Fourth Proportional to 228,065.21, 341,860.38 and 85,812.81

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Solution

The fourth proportional to 228,065.21, 341,860.38 and 85,812.81 is: 128,629.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    228,065.21 : 341,860.38 = 85,812.81 : x
  2. Step 2: Convert to fraction form
    228,065.21/341,860.38 = 85,812.81/x
  3. Step 3: Cross multiply
    228,065.21x = 341,860.38 × 85,812.81
  4. Step 4: Simplify right side
    228,065.21x = 29,335,999,835.47
  5. Step 5: Solve for x
    x = 29,335,999,835.47/228,065.21
  6. Step 6: Final answer
    x = 128,629.88

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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.