Home / 81,968.10-122,952.15-74,580.90

Finding the Fourth Proportional to 81,968.10, 122,952.15 and 74,580.90

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Solution

The fourth proportional to 81,968.10, 122,952.15 and 74,580.90 is: 111,871.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,968.10 : 122,952.15 = 74,580.90 : x
  2. Step 2: Convert to fraction form
    81,968.10/122,952.15 = 74,580.90/x
  3. Step 3: Cross multiply
    81,968.10x = 122,952.15 × 74,580.90
  4. Step 4: Simplify right side
    81,968.10x = 9,169,882,003.94
  5. Step 5: Solve for x
    x = 9,169,882,003.94/81,968.10
  6. Step 6: Final answer
    x = 111,871.35

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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.