Home / 129,929.82-179,272.62-78,941.04

Finding the Fourth Proportional to 129,929.82, 179,272.62 and 78,941.04

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Solution

The fourth proportional to 129,929.82, 179,272.62 and 78,941.04 is: 108,920.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,929.82 : 179,272.62 = 78,941.04 : x
  2. Step 2: Convert to fraction form
    129,929.82/179,272.62 = 78,941.04/x
  3. Step 3: Cross multiply
    129,929.82x = 179,272.62 × 78,941.04
  4. Step 4: Simplify right side
    129,929.82x = 14,151,967,066.32
  5. Step 5: Solve for x
    x = 14,151,967,066.32/129,929.82
  6. Step 6: Final answer
    x = 108,920.09

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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.