Home / 81,739.28-122,546.56-42,271.20

Finding the Fourth Proportional to 81,739.28, 122,546.56 and 42,271.20

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Solution

The fourth proportional to 81,739.28, 122,546.56 and 42,271.20 is: 63,374.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,739.28 : 122,546.56 = 42,271.20 : x
  2. Step 2: Convert to fraction form
    81,739.28/122,546.56 = 42,271.20/x
  3. Step 3: Cross multiply
    81,739.28x = 122,546.56 × 42,271.20
  4. Step 4: Simplify right side
    81,739.28x = 5,180,190,147.07
  5. Step 5: Solve for x
    x = 5,180,190,147.07/81,739.28
  6. Step 6: Final answer
    x = 63,374.55

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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.