Home / 126,021.60-189,032.40-105,285.60

Finding the Fourth Proportional to 126,021.60, 189,032.40 and 105,285.60

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Solution

The fourth proportional to 126,021.60, 189,032.40 and 105,285.60 is: 157,928.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    126,021.60 : 189,032.40 = 105,285.60 : x
  2. Step 2: Convert to fraction form
    126,021.60/189,032.40 = 105,285.60/x
  3. Step 3: Cross multiply
    126,021.60x = 189,032.40 × 105,285.60
  4. Step 4: Simplify right side
    126,021.60x = 19,902,389,653.44
  5. Step 5: Solve for x
    x = 19,902,389,653.44/126,021.60
  6. Step 6: Final answer
    x = 157,928.40

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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.