Home / 120,720.10-180,734.55-74,064.10

Finding the Fourth Proportional to 120,720.10, 180,734.55 and 74,064.10

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Solution

The fourth proportional to 120,720.10, 180,734.55 and 74,064.10 is: 110,884.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,720.10 : 180,734.55 = 74,064.10 : x
  2. Step 2: Convert to fraction form
    120,720.10/180,734.55 = 74,064.10/x
  3. Step 3: Cross multiply
    120,720.10x = 180,734.55 × 74,064.10
  4. Step 4: Simplify right side
    120,720.10x = 13,385,941,784.66
  5. Step 5: Solve for x
    x = 13,385,941,784.66/120,720.10
  6. Step 6: Final answer
    x = 110,884.12

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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.