Home / 128,962.80-193,163.74-78,891.44

Finding the Fourth Proportional to 128,962.80, 193,163.74 and 78,891.44

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Solution

The fourth proportional to 128,962.80, 193,163.74 and 78,891.44 is: 118,165.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,962.80 : 193,163.74 = 78,891.44 : x
  2. Step 2: Convert to fraction form
    128,962.80/193,163.74 = 78,891.44/x
  3. Step 3: Cross multiply
    128,962.80x = 193,163.74 × 78,891.44
  4. Step 4: Simplify right side
    128,962.80x = 15,238,964,441.34
  5. Step 5: Solve for x
    x = 15,238,964,441.34/128,962.80
  6. Step 6: Final answer
    x = 118,165.58

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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.