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Finding the Fourth Proportional to 263,160, 363,138.73 and 155,711.21

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Solution

The fourth proportional to 263,160, 363,138.73 and 155,711.21 is: 214,868.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,160 : 363,138.73 = 155,711.21 : x
  2. Step 2: Convert to fraction form
    263,160/363,138.73 = 155,711.21/x
  3. Step 3: Cross multiply
    263,160x = 363,138.73 × 155,711.21
  4. Step 4: Simplify right side
    263,160x = 56,544,768,841.19
  5. Step 5: Solve for x
    x = 56,544,768,841.19/263,160
  6. Step 6: Final answer
    x = 214,868.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.