Home / 81,027.16-121,365.78-79,044.28

Finding the Fourth Proportional to 81,027.16, 121,365.78 and 79,044.28

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Solution

The fourth proportional to 81,027.16, 121,365.78 and 79,044.28 is: 118,395.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,027.16 : 121,365.78 = 79,044.28 : x
  2. Step 2: Convert to fraction form
    81,027.16/121,365.78 = 79,044.28/x
  3. Step 3: Cross multiply
    81,027.16x = 121,365.78 × 79,044.28
  4. Step 4: Simplify right side
    81,027.16x = 9,593,270,696.74
  5. Step 5: Solve for x
    x = 9,593,270,696.74/81,027.16
  6. Step 6: Final answer
    x = 118,395.74

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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.