Home / 120,130.87-165,777.36-66,418.15

Finding the Fourth Proportional to 120,130.87, 165,777.36 and 66,418.15

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Solution

The fourth proportional to 120,130.87, 165,777.36 and 66,418.15 is: 91,655.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,130.87 : 165,777.36 = 66,418.15 : x
  2. Step 2: Convert to fraction form
    120,130.87/165,777.36 = 66,418.15/x
  3. Step 3: Cross multiply
    120,130.87x = 165,777.36 × 66,418.15
  4. Step 4: Simplify right side
    120,130.87x = 11,010,625,563.08
  5. Step 5: Solve for x
    x = 11,010,625,563.08/120,130.87
  6. Step 6: Final answer
    x = 91,655.26

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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.