Home / 81,921.32-122,929.74-34,533.51

Finding the Fourth Proportional to 81,921.32, 122,929.74 and 34,533.51

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Solution

The fourth proportional to 81,921.32, 122,929.74 and 34,533.51 is: 51,820.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,921.32 : 122,929.74 = 34,533.51 : x
  2. Step 2: Convert to fraction form
    81,921.32/122,929.74 = 34,533.51/x
  3. Step 3: Cross multiply
    81,921.32x = 122,929.74 × 34,533.51
  4. Step 4: Simplify right side
    81,921.32x = 4,245,195,405.59
  5. Step 5: Solve for x
    x = 4,245,195,405.59/81,921.32
  6. Step 6: Final answer
    x = 51,820.40

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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.