Home / 81,185.84-121,778.78-53,129.52

Finding the Fourth Proportional to 81,185.84, 121,778.78 and 53,129.52

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Solution

The fourth proportional to 81,185.84, 121,778.78 and 53,129.52 is: 79,694.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,185.84 : 121,778.78 = 53,129.52 : x
  2. Step 2: Convert to fraction form
    81,185.84/121,778.78 = 53,129.52/x
  3. Step 3: Cross multiply
    81,185.84x = 121,778.78 × 53,129.52
  4. Step 4: Simplify right side
    81,185.84x = 6,470,048,127.59
  5. Step 5: Solve for x
    x = 6,470,048,127.59/81,185.84
  6. Step 6: Final answer
    x = 79,694.29

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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.