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Finding the Fourth Proportional to 217,425.20, 326,137.80 and 93,009.20

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Solution

The fourth proportional to 217,425.20, 326,137.80 and 93,009.20 is: 139,513.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,425.20 : 326,137.80 = 93,009.20 : x
  2. Step 2: Convert to fraction form
    217,425.20/326,137.80 = 93,009.20/x
  3. Step 3: Cross multiply
    217,425.20x = 326,137.80 × 93,009.20
  4. Step 4: Simplify right side
    217,425.20x = 30,333,815,867.76
  5. Step 5: Solve for x
    x = 30,333,815,867.76/217,425.20
  6. Step 6: Final answer
    x = 139,513.80

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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.