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Finding the Fourth Proportional to 120,720.60, 181,080.90 and 112,944.60

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Solution

The fourth proportional to 120,720.60, 181,080.90 and 112,944.60 is: 169,416.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,720.60 : 181,080.90 = 112,944.60 : x
  2. Step 2: Convert to fraction form
    120,720.60/181,080.90 = 112,944.60/x
  3. Step 3: Cross multiply
    120,720.60x = 181,080.90 × 112,944.60
  4. Step 4: Simplify right side
    120,720.60x = 20,452,109,818.14
  5. Step 5: Solve for x
    x = 20,452,109,818.14/120,720.60
  6. Step 6: Final answer
    x = 169,416.90

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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.