Home / 81,147.68-121,621.04-45,980.72

Finding the Fourth Proportional to 81,147.68, 121,621.04 and 45,980.72

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Solution

The fourth proportional to 81,147.68, 121,621.04 and 45,980.72 is: 68,914.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,147.68 : 121,621.04 = 45,980.72 : x
  2. Step 2: Convert to fraction form
    81,147.68/121,621.04 = 45,980.72/x
  3. Step 3: Cross multiply
    81,147.68x = 121,621.04 × 45,980.72
  4. Step 4: Simplify right side
    81,147.68x = 5,592,222,986.35
  5. Step 5: Solve for x
    x = 5,592,222,986.35/81,147.68
  6. Step 6: Final answer
    x = 68,914.15

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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.