Home / 128,918.88-193,180.48-53,998

Finding the Fourth Proportional to 128,918.88, 193,180.48 and 53,998

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Solution

The fourth proportional to 128,918.88, 193,180.48 and 53,998 is: 80,914.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,918.88 : 193,180.48 = 53,998 : x
  2. Step 2: Convert to fraction form
    128,918.88/193,180.48 = 53,998/x
  3. Step 3: Cross multiply
    128,918.88x = 193,180.48 × 53,998
  4. Step 4: Simplify right side
    128,918.88x = 10,431,359,559.04
  5. Step 5: Solve for x
    x = 10,431,359,559.04/128,918.88
  6. Step 6: Final answer
    x = 80,914.13

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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.