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Finding the Fourth Proportional to 81,014.80, 121,522.20 and 74,599.60

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Solution

The fourth proportional to 81,014.80, 121,522.20 and 74,599.60 is: 111,899.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,014.80 : 121,522.20 = 74,599.60 : x
  2. Step 2: Convert to fraction form
    81,014.80/121,522.20 = 74,599.60/x
  3. Step 3: Cross multiply
    81,014.80x = 121,522.20 × 74,599.60
  4. Step 4: Simplify right side
    81,014.80x = 9,065,507,511.12
  5. Step 5: Solve for x
    x = 9,065,507,511.12/81,014.80
  6. Step 6: Final answer
    x = 111,899.40

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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.