Home / 81,962.40-122,943.60-74,186.40

Finding the Fourth Proportional to 81,962.40, 122,943.60 and 74,186.40

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Solution

The fourth proportional to 81,962.40, 122,943.60 and 74,186.40 is: 111,279.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,962.40 : 122,943.60 = 74,186.40 : x
  2. Step 2: Convert to fraction form
    81,962.40/122,943.60 = 74,186.40/x
  3. Step 3: Cross multiply
    81,962.40x = 122,943.60 × 74,186.40
  4. Step 4: Simplify right side
    81,962.40x = 9,120,743,087.04
  5. Step 5: Solve for x
    x = 9,120,743,087.04/81,962.40
  6. Step 6: Final answer
    x = 111,279.60

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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.