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Finding the Fourth Proportional to 79,172.88, 109,254.51 and 43,355.97

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Solution

The fourth proportional to 79,172.88, 109,254.51 and 43,355.97 is: 59,829.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,172.88 : 109,254.51 = 43,355.97 : x
  2. Step 2: Convert to fraction form
    79,172.88/109,254.51 = 43,355.97/x
  3. Step 3: Cross multiply
    79,172.88x = 109,254.51 × 43,355.97
  4. Step 4: Simplify right side
    79,172.88x = 4,736,835,257.92
  5. Step 5: Solve for x
    x = 4,736,835,257.92/79,172.88
  6. Step 6: Final answer
    x = 59,829.01

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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.