Home / 218,207.89-301,137.09-121,412.28

Finding the Fourth Proportional to 218,207.89, 301,137.09 and 121,412.28

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Solution

The fourth proportional to 218,207.89, 301,137.09 and 121,412.28 is: 167,554.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,207.89 : 301,137.09 = 121,412.28 : x
  2. Step 2: Convert to fraction form
    218,207.89/301,137.09 = 121,412.28/x
  3. Step 3: Cross multiply
    218,207.89x = 301,137.09 × 121,412.28
  4. Step 4: Simplify right side
    218,207.89x = 36,561,740,689.47
  5. Step 5: Solve for x
    x = 36,561,740,689.47/218,207.89
  6. Step 6: Final answer
    x = 167,554.63

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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.