Home / 127,830.20-191,526.60-81,028.40

Finding the Fourth Proportional to 127,830.20, 191,526.60 and 81,028.40

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Solution

The fourth proportional to 127,830.20, 191,526.60 and 81,028.40 is: 121,403.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,830.20 : 191,526.60 = 81,028.40 : x
  2. Step 2: Convert to fraction form
    127,830.20/191,526.60 = 81,028.40/x
  3. Step 3: Cross multiply
    127,830.20x = 191,526.60 × 81,028.40
  4. Step 4: Simplify right side
    127,830.20x = 15,519,093,955.44
  5. Step 5: Solve for x
    x = 15,519,093,955.44/127,830.20
  6. Step 6: Final answer
    x = 121,403.97

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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.