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Finding the Fourth Proportional to 219,868.80, 329,659.20 and 86,668.80

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Solution

The fourth proportional to 219,868.80, 329,659.20 and 86,668.80 is: 129,946.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,868.80 : 329,659.20 = 86,668.80 : x
  2. Step 2: Convert to fraction form
    219,868.80/329,659.20 = 86,668.80/x
  3. Step 3: Cross multiply
    219,868.80x = 329,659.20 × 86,668.80
  4. Step 4: Simplify right side
    219,868.80x = 28,571,167,272.96
  5. Step 5: Solve for x
    x = 28,571,167,272.96/219,868.80
  6. Step 6: Final answer
    x = 129,946.44

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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.