Home / 81,039.40-121,559.10-51,296.20

Finding the Fourth Proportional to 81,039.40, 121,559.10 and 51,296.20

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Solution

The fourth proportional to 81,039.40, 121,559.10 and 51,296.20 is: 76,944.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,039.40 : 121,559.10 = 51,296.20 : x
  2. Step 2: Convert to fraction form
    81,039.40/121,559.10 = 51,296.20/x
  3. Step 3: Cross multiply
    81,039.40x = 121,559.10 × 51,296.20
  4. Step 4: Simplify right side
    81,039.40x = 6,235,519,905.42
  5. Step 5: Solve for x
    x = 6,235,519,905.42/81,039.40
  6. Step 6: Final answer
    x = 76,944.30

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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.