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Finding the Fourth Proportional to 158,428.80, 218,450.88 and 126,576

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Solution

The fourth proportional to 158,428.80, 218,450.88 and 126,576 is: 174,530.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    158,428.80 : 218,450.88 = 126,576 : x
  2. Step 2: Convert to fraction form
    158,428.80/218,450.88 = 126,576/x
  3. Step 3: Cross multiply
    158,428.80x = 218,450.88 × 126,576
  4. Step 4: Simplify right side
    158,428.80x = 27,650,638,586.88
  5. Step 5: Solve for x
    x = 27,650,638,586.88/158,428.80
  6. Step 6: Final answer
    x = 174,530.38

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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.