Home / 137,425.20-189,642.96-80,840.40

Finding the Fourth Proportional to 137,425.20, 189,642.96 and 80,840.40

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Solution

The fourth proportional to 137,425.20, 189,642.96 and 80,840.40 is: 111,557.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,425.20 : 189,642.96 = 80,840.40 : x
  2. Step 2: Convert to fraction form
    137,425.20/189,642.96 = 80,840.40/x
  3. Step 3: Cross multiply
    137,425.20x = 189,642.96 × 80,840.40
  4. Step 4: Simplify right side
    137,425.20x = 15,330,812,743.58
  5. Step 5: Solve for x
    x = 15,330,812,743.58/137,425.20
  6. Step 6: Final answer
    x = 111,557.51

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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.