Home / 127,842.20-191,544.60-81,040.40

Finding the Fourth Proportional to 127,842.20, 191,544.60 and 81,040.40

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Solution

The fourth proportional to 127,842.20, 191,544.60 and 81,040.40 is: 121,421.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    127,842.20 : 191,544.60 = 81,040.40 : x
  2. Step 2: Convert to fraction form
    127,842.20/191,544.60 = 81,040.40/x
  3. Step 3: Cross multiply
    127,842.20x = 191,544.60 × 81,040.40
  4. Step 4: Simplify right side
    127,842.20x = 15,522,851,001.84
  5. Step 5: Solve for x
    x = 15,522,851,001.84/127,842.20
  6. Step 6: Final answer
    x = 121,421.96

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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.