Home / 128,090.55-191,914.38-99,636.33

Finding the Fourth Proportional to 128,090.55, 191,914.38 and 99,636.33

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Solution

The fourth proportional to 128,090.55, 191,914.38 and 99,636.33 is: 149,282.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,090.55 : 191,914.38 = 99,636.33 : x
  2. Step 2: Convert to fraction form
    128,090.55/191,914.38 = 99,636.33/x
  3. Step 3: Cross multiply
    128,090.55x = 191,914.38 × 99,636.33
  4. Step 4: Simplify right side
    128,090.55x = 19,121,644,497.43
  5. Step 5: Solve for x
    x = 19,121,644,497.43/128,090.55
  6. Step 6: Final answer
    x = 149,282.24

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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.