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Finding the Fourth Proportional to 79,273, 109,401.60 and 45,739

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Solution

The fourth proportional to 79,273, 109,401.60 and 45,739 is: 63,122.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,273 : 109,401.60 = 45,739 : x
  2. Step 2: Convert to fraction form
    79,273/109,401.60 = 45,739/x
  3. Step 3: Cross multiply
    79,273x = 109,401.60 × 45,739
  4. Step 4: Simplify right side
    79,273x = 5,003,919,782.40
  5. Step 5: Solve for x
    x = 5,003,919,782.40/79,273
  6. Step 6: Final answer
    x = 63,122.62

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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.