Home / 209,926.84-289,704.90-128,268.36

Finding the Fourth Proportional to 209,926.84, 289,704.90 and 128,268.36

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Solution

The fourth proportional to 209,926.84, 289,704.90 and 128,268.36 is: 177,013.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    209,926.84 : 289,704.90 = 128,268.36 : x
  2. Step 2: Convert to fraction form
    209,926.84/289,704.90 = 128,268.36/x
  3. Step 3: Cross multiply
    209,926.84x = 289,704.90 × 128,268.36
  4. Step 4: Simplify right side
    209,926.84x = 37,159,972,887.97
  5. Step 5: Solve for x
    x = 37,159,972,887.97/209,926.84
  6. Step 6: Final answer
    x = 177,013.92

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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.