Home / 128,489.22-192,779.19-57,405.24

Finding the Fourth Proportional to 128,489.22, 192,779.19 and 57,405.24

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Solution

The fourth proportional to 128,489.22, 192,779.19 and 57,405.24 is: 86,128.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,489.22 : 192,779.19 = 57,405.24 : x
  2. Step 2: Convert to fraction form
    128,489.22/192,779.19 = 57,405.24/x
  3. Step 3: Cross multiply
    128,489.22x = 192,779.19 × 57,405.24
  4. Step 4: Simplify right side
    128,489.22x = 11,066,535,668.96
  5. Step 5: Solve for x
    x = 11,066,535,668.96/128,489.22
  6. Step 6: Final answer
    x = 86,128.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.