Home / 128,926.84-193,390-72,741.45

Finding the Fourth Proportional to 128,926.84, 193,390 and 72,741.45

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Solution

The fourth proportional to 128,926.84, 193,390 and 72,741.45 is: 109,112.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,926.84 : 193,390 = 72,741.45 : x
  2. Step 2: Convert to fraction form
    128,926.84/193,390 = 72,741.45/x
  3. Step 3: Cross multiply
    128,926.84x = 193,390 × 72,741.45
  4. Step 4: Simplify right side
    128,926.84x = 14,067,469,015.50
  5. Step 5: Solve for x
    x = 14,067,469,015.50/128,926.84
  6. Step 6: Final answer
    x = 109,112.03

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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.