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Finding the Fourth Proportional to 79,428.99, 109,612.78 and 43,619.77

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Solution

The fourth proportional to 79,428.99, 109,612.78 and 43,619.77 is: 60,195.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,428.99 : 109,612.78 = 43,619.77 : x
  2. Step 2: Convert to fraction form
    79,428.99/109,612.78 = 43,619.77/x
  3. Step 3: Cross multiply
    79,428.99x = 109,612.78 × 43,619.77
  4. Step 4: Simplify right side
    79,428.99x = 4,781,283,664.06
  5. Step 5: Solve for x
    x = 4,781,283,664.06/79,428.99
  6. Step 6: Final answer
    x = 60,195.70

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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.