Home / 199,890.78-275,822.62-128,367.69

Finding the Fourth Proportional to 199,890.78, 275,822.62 and 128,367.69

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Solution

The fourth proportional to 199,890.78, 275,822.62 and 128,367.69 is: 177,130.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    199,890.78 : 275,822.62 = 128,367.69 : x
  2. Step 2: Convert to fraction form
    199,890.78/275,822.62 = 128,367.69/x
  3. Step 3: Cross multiply
    199,890.78x = 275,822.62 × 128,367.69
  4. Step 4: Simplify right side
    199,890.78x = 35,406,712,579.15
  5. Step 5: Solve for x
    x = 35,406,712,579.15/199,890.78
  6. Step 6: Final answer
    x = 177,130.29

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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.