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Finding the Fourth Proportional to 261,811, 361,299.18 and 142,579

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Solution

The fourth proportional to 261,811, 361,299.18 and 142,579 is: 196,759.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    261,811 : 361,299.18 = 142,579 : x
  2. Step 2: Convert to fraction form
    261,811/361,299.18 = 142,579/x
  3. Step 3: Cross multiply
    261,811x = 361,299.18 × 142,579
  4. Step 4: Simplify right side
    261,811x = 51,513,675,785.22
  5. Step 5: Solve for x
    x = 51,513,675,785.22/261,811
  6. Step 6: Final answer
    x = 196,759.02

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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.