Home / 258,209.78-356,320.01-143,495.55

Finding the Fourth Proportional to 258,209.78, 356,320.01 and 143,495.55

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Solution

The fourth proportional to 258,209.78, 356,320.01 and 143,495.55 is: 198,018.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,209.78 : 356,320.01 = 143,495.55 : x
  2. Step 2: Convert to fraction form
    258,209.78/356,320.01 = 143,495.55/x
  3. Step 3: Cross multiply
    258,209.78x = 356,320.01 × 143,495.55
  4. Step 4: Simplify right side
    258,209.78x = 51,130,336,169.69
  5. Step 5: Solve for x
    x = 51,130,336,169.69/258,209.78
  6. Step 6: Final answer
    x = 198,018.59

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1.5x scale

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.