Home / 120,137.58-165,775.53-66,415.38

Finding the Fourth Proportional to 120,137.58, 165,775.53 and 66,415.38

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Solution

The fourth proportional to 120,137.58, 165,775.53 and 66,415.38 is: 91,645.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,137.58 : 165,775.53 = 66,415.38 : x
  2. Step 2: Convert to fraction form
    120,137.58/165,775.53 = 66,415.38/x
  3. Step 3: Cross multiply
    120,137.58x = 165,775.53 × 66,415.38
  4. Step 4: Simplify right side
    120,137.58x = 11,010,044,819.65
  5. Step 5: Solve for x
    x = 11,010,044,819.65/120,137.58
  6. Step 6: Final answer
    x = 91,645.30

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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.