Home / 127,986.40-191,979.60-81,445.60

Finding the Fourth Proportional to 127,986.40, 191,979.60 and 81,445.60

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Solution

The fourth proportional to 127,986.40, 191,979.60 and 81,445.60 is: 122,168.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,986.40 : 191,979.60 = 81,445.60 : x
  2. Step 2: Convert to fraction form
    127,986.40/191,979.60 = 81,445.60/x
  3. Step 3: Cross multiply
    127,986.40x = 191,979.60 × 81,445.60
  4. Step 4: Simplify right side
    127,986.40x = 15,635,893,709.76
  5. Step 5: Solve for x
    x = 15,635,893,709.76/127,986.40
  6. Step 6: Final answer
    x = 122,168.40

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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.