Home / 112,819.52-155,608.14-81,021.08

Finding the Fourth Proportional to 112,819.52, 155,608.14 and 81,021.08

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Solution

The fourth proportional to 112,819.52, 155,608.14 and 81,021.08 is: 111,749.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    112,819.52 : 155,608.14 = 81,021.08 : x
  2. Step 2: Convert to fraction form
    112,819.52/155,608.14 = 81,021.08/x
  3. Step 3: Cross multiply
    112,819.52x = 155,608.14 × 81,021.08
  4. Step 4: Simplify right side
    112,819.52x = 12,607,539,559.59
  5. Step 5: Solve for x
    x = 12,607,539,559.59/112,819.52
  6. Step 6: Final answer
    x = 111,749.63

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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.