Home / 220,987.36-304,962-120,385.12

Finding the Fourth Proportional to 220,987.36, 304,962 and 120,385.12

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Solution

The fourth proportional to 220,987.36, 304,962 and 120,385.12 is: 166,131.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,987.36 : 304,962 = 120,385.12 : x
  2. Step 2: Convert to fraction form
    220,987.36/304,962 = 120,385.12/x
  3. Step 3: Cross multiply
    220,987.36x = 304,962 × 120,385.12
  4. Step 4: Simplify right side
    220,987.36x = 36,712,886,965.44
  5. Step 5: Solve for x
    x = 36,712,886,965.44/220,987.36
  6. Step 6: Final answer
    x = 166,131.16

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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.