Home / 120,128.24-165,777.48-66,412.88

Finding the Fourth Proportional to 120,128.24, 165,777.48 and 66,412.88

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Solution

The fourth proportional to 120,128.24, 165,777.48 and 66,412.88 is: 91,650.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,128.24 : 165,777.48 = 66,412.88 : x
  2. Step 2: Convert to fraction form
    120,128.24/165,777.48 = 66,412.88/x
  3. Step 3: Cross multiply
    120,128.24x = 165,777.48 × 66,412.88
  4. Step 4: Simplify right side
    120,128.24x = 11,009,759,885.94
  5. Step 5: Solve for x
    x = 11,009,759,885.94/120,128.24
  6. Step 6: Final answer
    x = 91,650.06

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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.