Home / 77,131.20-115,725.60-30,416.64

Finding the Fourth Proportional to 77,131.20, 115,725.60 and 30,416.64

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Solution

The fourth proportional to 77,131.20, 115,725.60 and 30,416.64 is: 45,636.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    77,131.20 : 115,725.60 = 30,416.64 : x
  2. Step 2: Convert to fraction form
    77,131.20/115,725.60 = 30,416.64/x
  3. Step 3: Cross multiply
    77,131.20x = 115,725.60 × 30,416.64
  4. Step 4: Simplify right side
    77,131.20x = 3,519,983,913.98
  5. Step 5: Solve for x
    x = 3,519,983,913.98/77,131.20
  6. Step 6: Final answer
    x = 45,636.32

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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.