Home / 257,836.78-355,807.89-143,115.09

Finding the Fourth Proportional to 257,836.78, 355,807.89 and 143,115.09

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Solution

The fourth proportional to 257,836.78, 355,807.89 and 143,115.09 is: 197,495.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,836.78 : 355,807.89 = 143,115.09 : x
  2. Step 2: Convert to fraction form
    257,836.78/355,807.89 = 143,115.09/x
  3. Step 3: Cross multiply
    257,836.78x = 355,807.89 × 143,115.09
  4. Step 4: Simplify right side
    257,836.78x = 50,921,478,200.06
  5. Step 5: Solve for x
    x = 50,921,478,200.06/257,836.78
  6. Step 6: Final answer
    x = 197,495.01

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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.