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Finding the Fourth Proportional to 263,395.46, 395,053.10 and 85,902.19

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Solution

The fourth proportional to 263,395.46, 395,053.10 and 85,902.19 is: 128,840.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,395.46 : 395,053.10 = 85,902.19 : x
  2. Step 2: Convert to fraction form
    263,395.46/395,053.10 = 85,902.19/x
  3. Step 3: Cross multiply
    263,395.46x = 395,053.10 × 85,902.19
  4. Step 4: Simplify right side
    263,395.46x = 33,935,925,361.28
  5. Step 5: Solve for x
    x = 33,935,925,361.28/263,395.46
  6. Step 6: Final answer
    x = 128,840.20

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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.