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Finding the Fourth Proportional to 79,315.66, 118,967.16 and 31,897.32

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Solution

The fourth proportional to 79,315.66, 118,967.16 and 31,897.32 is: 47,843.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,315.66 : 118,967.16 = 31,897.32 : x
  2. Step 2: Convert to fraction form
    79,315.66/118,967.16 = 31,897.32/x
  3. Step 3: Cross multiply
    79,315.66x = 118,967.16 × 31,897.32
  4. Step 4: Simplify right side
    79,315.66x = 3,794,733,310.96
  5. Step 5: Solve for x
    x = 3,794,733,310.96/79,315.66
  6. Step 6: Final answer
    x = 47,843.43

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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.