Home / 155,021.90-213,984.18-91,355.63

Finding the Fourth Proportional to 155,021.90, 213,984.18 and 91,355.63

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Solution

The fourth proportional to 155,021.90, 213,984.18 and 91,355.63 is: 126,102.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    155,021.90 : 213,984.18 = 91,355.63 : x
  2. Step 2: Convert to fraction form
    155,021.90/213,984.18 = 91,355.63/x
  3. Step 3: Cross multiply
    155,021.90x = 213,984.18 × 91,355.63
  4. Step 4: Simplify right side
    155,021.90x = 19,548,658,504.01
  5. Step 5: Solve for x
    x = 19,548,658,504.01/155,021.90
  6. Step 6: Final answer
    x = 126,102.56

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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.