Home / 109,255.75-150,815.25-85,390.11

Finding the Fourth Proportional to 109,255.75, 150,815.25 and 85,390.11

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Solution

The fourth proportional to 109,255.75, 150,815.25 and 85,390.11 is: 117,871.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    109,255.75 : 150,815.25 = 85,390.11 : x
  2. Step 2: Convert to fraction form
    109,255.75/150,815.25 = 85,390.11/x
  3. Step 3: Cross multiply
    109,255.75x = 150,815.25 × 85,390.11
  4. Step 4: Simplify right side
    109,255.75x = 12,878,130,787.18
  5. Step 5: Solve for x
    x = 12,878,130,787.18/109,255.75
  6. Step 6: Final answer
    x = 117,871.43

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.