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Finding the Fourth Proportional to 120,625.40, 180,938.10 and 73,969.40

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Solution

The fourth proportional to 120,625.40, 180,938.10 and 73,969.40 is: 110,954.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,625.40 : 180,938.10 = 73,969.40 : x
  2. Step 2: Convert to fraction form
    120,625.40/180,938.10 = 73,969.40/x
  3. Step 3: Cross multiply
    120,625.40x = 180,938.10 × 73,969.40
  4. Step 4: Simplify right side
    120,625.40x = 13,383,882,694.14
  5. Step 5: Solve for x
    x = 13,383,882,694.14/120,625.40
  6. Step 6: Final answer
    x = 110,954.10

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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.