Home / 137,639.76-189,903.79-80,281.56

Finding the Fourth Proportional to 137,639.76, 189,903.79 and 80,281.56

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Solution

The fourth proportional to 137,639.76, 189,903.79 and 80,281.56 is: 110,765.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,639.76 : 189,903.79 = 80,281.56 : x
  2. Step 2: Convert to fraction form
    137,639.76/189,903.79 = 80,281.56/x
  3. Step 3: Cross multiply
    137,639.76x = 189,903.79 × 80,281.56
  4. Step 4: Simplify right side
    137,639.76x = 15,245,773,323.60
  5. Step 5: Solve for x
    x = 15,245,773,323.60/137,639.76
  6. Step 6: Final answer
    x = 110,765.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.