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Finding the Fourth Proportional to 79,026, 118,539 and 20,658

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Solution

The fourth proportional to 79,026, 118,539 and 20,658 is: 30,987

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,026 : 118,539 = 20,658 : x
  2. Step 2: Convert to fraction form
    79,026/118,539 = 20,658/x
  3. Step 3: Cross multiply
    79,026x = 118,539 × 20,658
  4. Step 4: Simplify right side
    79,026x = 2,448,778,662
  5. Step 5: Solve for x
    x = 2,448,778,662/79,026
  6. Step 6: Final answer
    x = 30,987

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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.