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Finding the Fourth Proportional to 217,179.90, 325,510.65 and 90,819.90

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Solution

The fourth proportional to 217,179.90, 325,510.65 and 90,819.90 is: 136,121.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    217,179.90 : 325,510.65 = 90,819.90 : x
  2. Step 2: Convert to fraction form
    217,179.90/325,510.65 = 90,819.90/x
  3. Step 3: Cross multiply
    217,179.90x = 325,510.65 × 90,819.90
  4. Step 4: Simplify right side
    217,179.90x = 29,562,844,681.94
  5. Step 5: Solve for x
    x = 29,562,844,681.94/217,179.90
  6. Step 6: Final answer
    x = 136,121.46

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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.