Home / 120,135.07-165,778.26-66,412.83

Finding the Fourth Proportional to 120,135.07, 165,778.26 and 66,412.83

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Solution

The fourth proportional to 120,135.07, 165,778.26 and 66,412.83 is: 91,645.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,135.07 : 165,778.26 = 66,412.83 : x
  2. Step 2: Convert to fraction form
    120,135.07/165,778.26 = 66,412.83/x
  3. Step 3: Cross multiply
    120,135.07x = 165,778.26 × 66,412.83
  4. Step 4: Simplify right side
    120,135.07x = 11,009,803,399.08
  5. Step 5: Solve for x
    x = 11,009,803,399.08/120,135.07
  6. Step 6: Final answer
    x = 91,645.21

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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.