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Finding the Fourth Proportional to 216,992.97, 299,485.76 and 129,772.35

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Solution

The fourth proportional to 216,992.97, 299,485.76 and 129,772.35 is: 179,107.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,992.97 : 299,485.76 = 129,772.35 : x
  2. Step 2: Convert to fraction form
    216,992.97/299,485.76 = 129,772.35/x
  3. Step 3: Cross multiply
    216,992.97x = 299,485.76 × 129,772.35
  4. Step 4: Simplify right side
    216,992.97x = 38,864,970,217.87
  5. Step 5: Solve for x
    x = 38,864,970,217.87/216,992.97
  6. Step 6: Final answer
    x = 179,107.05

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1.5x scale

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.