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Finding the Fourth Proportional to 79,324, 118,990.86 and 23,920

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Solution

The fourth proportional to 79,324, 118,990.86 and 23,920 is: 35,881.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,324 : 118,990.86 = 23,920 : x
  2. Step 2: Convert to fraction form
    79,324/118,990.86 = 23,920/x
  3. Step 3: Cross multiply
    79,324x = 118,990.86 × 23,920
  4. Step 4: Simplify right side
    79,324x = 2,846,261,371.20
  5. Step 5: Solve for x
    x = 2,846,261,371.20/79,324
  6. Step 6: Final answer
    x = 35,881.47

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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.