Home / 74,712.40-111,995.70-66,839.20

Finding the Fourth Proportional to 74,712.40, 111,995.70 and 66,839.20

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Solution

The fourth proportional to 74,712.40, 111,995.70 and 66,839.20 is: 100,193.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    74,712.40 : 111,995.70 = 66,839.20 : x
  2. Step 2: Convert to fraction form
    74,712.40/111,995.70 = 66,839.20/x
  3. Step 3: Cross multiply
    74,712.40x = 111,995.70 × 66,839.20
  4. Step 4: Simplify right side
    74,712.40x = 7,485,702,991.44
  5. Step 5: Solve for x
    x = 7,485,702,991.44/74,712.40
  6. Step 6: Final answer
    x = 100,193.58

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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.