Home / 120,163.08-165,829.41-77,721.60

Finding the Fourth Proportional to 120,163.08, 165,829.41 and 77,721.60

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Solution

The fourth proportional to 120,163.08, 165,829.41 and 77,721.60 is: 107,258.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,163.08 : 165,829.41 = 77,721.60 : x
  2. Step 2: Convert to fraction form
    120,163.08/165,829.41 = 77,721.60/x
  3. Step 3: Cross multiply
    120,163.08x = 165,829.41 × 77,721.60
  4. Step 4: Simplify right side
    120,163.08x = 12,888,527,072.26
  5. Step 5: Solve for x
    x = 12,888,527,072.26/120,163.08
  6. Step 6: Final answer
    x = 107,258.63

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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.