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Finding the Fourth Proportional to 120,720.60, 180,735.30 and 74,064.60

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Solution

The fourth proportional to 120,720.60, 180,735.30 and 74,064.60 is: 110,884.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,720.60 : 180,735.30 = 74,064.60 : x
  2. Step 2: Convert to fraction form
    120,720.60/180,735.30 = 74,064.60/x
  3. Step 3: Cross multiply
    120,720.60x = 180,735.30 × 74,064.60
  4. Step 4: Simplify right side
    120,720.60x = 13,386,087,700.38
  5. Step 5: Solve for x
    x = 13,386,087,700.38/120,720.60
  6. Step 6: Final answer
    x = 110,884.87

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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.