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Finding the Fourth Proportional to 79,000, 109,020 and 43,672

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Solution

The fourth proportional to 79,000, 109,020 and 43,672 is: 60,267.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,000 : 109,020 = 43,672 : x
  2. Step 2: Convert to fraction form
    79,000/109,020 = 43,672/x
  3. Step 3: Cross multiply
    79,000x = 109,020 × 43,672
  4. Step 4: Simplify right side
    79,000x = 4,761,121,440
  5. Step 5: Solve for x
    x = 4,761,121,440/79,000
  6. Step 6: Final answer
    x = 60,267.36

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.