Home / 120,732.30-181,217.64-90,641.88

Finding the Fourth Proportional to 120,732.30, 181,217.64 and 90,641.88

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Solution

The fourth proportional to 120,732.30, 181,217.64 and 90,641.88 is: 136,052.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,732.30 : 181,217.64 = 90,641.88 : x
  2. Step 2: Convert to fraction form
    120,732.30/181,217.64 = 90,641.88/x
  3. Step 3: Cross multiply
    120,732.30x = 181,217.64 × 90,641.88
  4. Step 4: Simplify right side
    120,732.30x = 16,425,907,578.76
  5. Step 5: Solve for x
    x = 16,425,907,578.76/120,732.30
  6. Step 6: Final answer
    x = 136,052.30

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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.