Home / 213,018.45-319,571.41-86,658.37

Finding the Fourth Proportional to 213,018.45, 319,571.41 and 86,658.37

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Solution

The fourth proportional to 213,018.45, 319,571.41 and 86,658.37 is: 130,005.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    213,018.45 : 319,571.41 = 86,658.37 : x
  2. Step 2: Convert to fraction form
    213,018.45/319,571.41 = 86,658.37/x
  3. Step 3: Cross multiply
    213,018.45x = 319,571.41 × 86,658.37
  4. Step 4: Simplify right side
    213,018.45x = 27,693,537,489.20
  5. Step 5: Solve for x
    x = 27,693,537,489.20/213,018.45
  6. Step 6: Final answer
    x = 130,005.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.