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Finding the Fourth Proportional to 216,721.52, 325,117 and 66,926.60

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Solution

The fourth proportional to 216,721.52, 325,117 and 66,926.60 is: 100,400.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,721.52 : 325,117 = 66,926.60 : x
  2. Step 2: Convert to fraction form
    216,721.52/325,117 = 66,926.60/x
  3. Step 3: Cross multiply
    216,721.52x = 325,117 × 66,926.60
  4. Step 4: Simplify right side
    216,721.52x = 21,758,973,786.62
  5. Step 5: Solve for x
    x = 21,758,973,786.62/216,721.52
  6. Step 6: Final answer
    x = 100,400.62

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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.