Home / 216,918.72-299,361.12-121,431.36

Finding the Fourth Proportional to 216,918.72, 299,361.12 and 121,431.36

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Solution

The fourth proportional to 216,918.72, 299,361.12 and 121,431.36 is: 167,582.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    216,918.72 : 299,361.12 = 121,431.36 : x
  2. Step 2: Convert to fraction form
    216,918.72/299,361.12 = 121,431.36/x
  3. Step 3: Cross multiply
    216,918.72x = 299,361.12 × 121,431.36
  4. Step 4: Simplify right side
    216,918.72x = 36,351,827,932.72
  5. Step 5: Solve for x
    x = 36,351,827,932.72/216,918.72
  6. Step 6: Final answer
    x = 167,582.71

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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.