Home / 81,371.36-121,341.04-74,908.64

Finding the Fourth Proportional to 81,371.36, 121,341.04 and 74,908.64

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Solution

The fourth proportional to 81,371.36, 121,341.04 and 74,908.64 is: 111,703.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,371.36 : 121,341.04 = 74,908.64 : x
  2. Step 2: Convert to fraction form
    81,371.36/121,341.04 = 74,908.64/x
  3. Step 3: Cross multiply
    81,371.36x = 121,341.04 × 74,908.64
  4. Step 4: Simplify right side
    81,371.36x = 9,089,492,282.59
  5. Step 5: Solve for x
    x = 9,089,492,282.59/81,371.36
  6. Step 6: Final answer
    x = 111,703.83

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.