Home / 137,120.28-189,225.44-76,690.68

Finding the Fourth Proportional to 137,120.28, 189,225.44 and 76,690.68

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Solution

The fourth proportional to 137,120.28, 189,225.44 and 76,690.68 is: 105,832.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    137,120.28 : 189,225.44 = 76,690.68 : x
  2. Step 2: Convert to fraction form
    137,120.28/189,225.44 = 76,690.68/x
  3. Step 3: Cross multiply
    137,120.28x = 189,225.44 × 76,690.68
  4. Step 4: Simplify right side
    137,120.28x = 14,511,827,666.90
  5. Step 5: Solve for x
    x = 14,511,827,666.90/137,120.28
  6. Step 6: Final answer
    x = 105,832.83

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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.