Home / 81,320.56-121,923.24-31,358.32

Finding the Fourth Proportional to 81,320.56, 121,923.24 and 31,358.32

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Solution

The fourth proportional to 81,320.56, 121,923.24 and 31,358.32 is: 47,015.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,320.56 : 121,923.24 = 31,358.32 : x
  2. Step 2: Convert to fraction form
    81,320.56/121,923.24 = 31,358.32/x
  3. Step 3: Cross multiply
    81,320.56x = 121,923.24 × 31,358.32
  4. Step 4: Simplify right side
    81,320.56x = 3,823,307,975.36
  5. Step 5: Solve for x
    x = 3,823,307,975.36/81,320.56
  6. Step 6: Final answer
    x = 47,015.27

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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.