Home / 128,231.99-177,009.53-114,779.51

Finding the Fourth Proportional to 128,231.99, 177,009.53 and 114,779.51

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Solution

The fourth proportional to 128,231.99, 177,009.53 and 114,779.51 is: 158,439.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    128,231.99 : 177,009.53 = 114,779.51 : x
  2. Step 2: Convert to fraction form
    128,231.99/177,009.53 = 114,779.51/x
  3. Step 3: Cross multiply
    128,231.99x = 177,009.53 × 114,779.51
  4. Step 4: Simplify right side
    128,231.99x = 20,317,065,659.79
  5. Step 5: Solve for x
    x = 20,317,065,659.79/128,231.99
  6. Step 6: Final answer
    x = 158,439.92

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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.