Home / 80,787.36-121,231.56-30,871.72

Finding the Fourth Proportional to 80,787.36, 121,231.56 and 30,871.72

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Solution

The fourth proportional to 80,787.36, 121,231.56 and 30,871.72 is: 46,326.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,787.36 : 121,231.56 = 30,871.72 : x
  2. Step 2: Convert to fraction form
    80,787.36/121,231.56 = 30,871.72/x
  3. Step 3: Cross multiply
    80,787.36x = 121,231.56 × 30,871.72
  4. Step 4: Simplify right side
    80,787.36x = 3,742,626,775.48
  5. Step 5: Solve for x
    x = 3,742,626,775.48/80,787.36
  6. Step 6: Final answer
    x = 46,326.89

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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.