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Finding the Fourth Proportional to 81,014.90, 121,522.35 and 67,892.90

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Solution

The fourth proportional to 81,014.90, 121,522.35 and 67,892.90 is: 101,839.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.90 : 121,522.35 = 67,892.90 : x
  2. Step 2: Convert to fraction form
    81,014.90/121,522.35 = 67,892.90/x
  3. Step 3: Cross multiply
    81,014.90x = 121,522.35 × 67,892.90
  4. Step 4: Simplify right side
    81,014.90x = 8,250,504,756.32
  5. Step 5: Solve for x
    x = 8,250,504,756.32/81,014.90
  6. Step 6: Final answer
    x = 101,839.35

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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.