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Finding the Fourth Proportional to 219,675.40, 329,075.70 and 126,071.80

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Solution

The fourth proportional to 219,675.40, 329,075.70 and 126,071.80 is: 188,856.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,675.40 : 329,075.70 = 126,071.80 : x
  2. Step 2: Convert to fraction form
    219,675.40/329,075.70 = 126,071.80/x
  3. Step 3: Cross multiply
    219,675.40x = 329,075.70 × 126,071.80
  4. Step 4: Simplify right side
    219,675.40x = 41,487,165,835.26
  5. Step 5: Solve for x
    x = 41,487,165,835.26/219,675.40
  6. Step 6: Final answer
    x = 188,856.68

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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.