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Finding the Fourth Proportional to 257,762.05, 355,710.86 and 143,057.97

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Solution

The fourth proportional to 257,762.05, 355,710.86 and 143,057.97 is: 197,419.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,762.05 : 355,710.86 = 143,057.97 : x
  2. Step 2: Convert to fraction form
    257,762.05/355,710.86 = 143,057.97/x
  3. Step 3: Cross multiply
    257,762.05x = 355,710.86 × 143,057.97
  4. Step 4: Simplify right side
    257,762.05x = 50,887,273,538.55
  5. Step 5: Solve for x
    x = 50,887,273,538.55/257,762.05
  6. Step 6: Final answer
    x = 197,419.57

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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.