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Finding the Fourth Proportional to 216,103.62, 298,262.02 and 128,894.31

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Solution

The fourth proportional to 216,103.62, 298,262.02 and 128,894.31 is: 177,897.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,103.62 : 298,262.02 = 128,894.31 : x
  2. Step 2: Convert to fraction form
    216,103.62/298,262.02 = 128,894.31/x
  3. Step 3: Cross multiply
    216,103.62x = 298,262.02 × 128,894.31
  4. Step 4: Simplify right side
    216,103.62x = 38,444,276,843.69
  5. Step 5: Solve for x
    x = 38,444,276,843.69/216,103.62
  6. Step 6: Final answer
    x = 177,897.43

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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.