Home / 100,187.37-138,273.75-57,166.65

Finding the Fourth Proportional to 100,187.37, 138,273.75 and 57,166.65

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Solution

The fourth proportional to 100,187.37, 138,273.75 and 57,166.65 is: 78,898.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    100,187.37 : 138,273.75 = 57,166.65 : x
  2. Step 2: Convert to fraction form
    100,187.37/138,273.75 = 57,166.65/x
  3. Step 3: Cross multiply
    100,187.37x = 138,273.75 × 57,166.65
  4. Step 4: Simplify right side
    100,187.37x = 7,904,647,070.44
  5. Step 5: Solve for x
    x = 7,904,647,070.44/100,187.37
  6. Step 6: Final answer
    x = 78,898.64

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1.5x scale

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.