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Finding the Fourth Proportional to 216,930, 325,358.28 and 59,121.48

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Solution

The fourth proportional to 216,930, 325,358.28 and 59,121.48 is: 88,672.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,930 : 325,358.28 = 59,121.48 : x
  2. Step 2: Convert to fraction form
    216,930/325,358.28 = 59,121.48/x
  3. Step 3: Cross multiply
    216,930x = 325,358.28 × 59,121.48
  4. Step 4: Simplify right side
    216,930x = 19,235,663,043.85
  5. Step 5: Solve for x
    x = 19,235,663,043.85/216,930
  6. Step 6: Final answer
    x = 88,672.21

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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.