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Finding the Fourth Proportional to 79,262.56, 118,859.28 and 29,980

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Solution

The fourth proportional to 79,262.56, 118,859.28 and 29,980 is: 44,956.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,262.56 : 118,859.28 = 29,980 : x
  2. Step 2: Convert to fraction form
    79,262.56/118,859.28 = 29,980/x
  3. Step 3: Cross multiply
    79,262.56x = 118,859.28 × 29,980
  4. Step 4: Simplify right side
    79,262.56x = 3,563,401,214.40
  5. Step 5: Solve for x
    x = 3,563,401,214.40/79,262.56
  6. Step 6: Final answer
    x = 44,956.93

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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.