Home / 81,601.56-121,724.20-80,248.24

Finding the Fourth Proportional to 81,601.56, 121,724.20 and 80,248.24

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Solution

The fourth proportional to 81,601.56, 121,724.20 and 80,248.24 is: 119,705.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    81,601.56 : 121,724.20 = 80,248.24 : x
  2. Step 2: Convert to fraction form
    81,601.56/121,724.20 = 80,248.24/x
  3. Step 3: Cross multiply
    81,601.56x = 121,724.20 × 80,248.24
  4. Step 4: Simplify right side
    81,601.56x = 9,768,152,815.41
  5. Step 5: Solve for x
    x = 9,768,152,815.41/81,601.56
  6. Step 6: Final answer
    x = 119,705.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.