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Finding the Fourth Proportional to 120,859, 181,158.90 and 58,391.80

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Solution

The fourth proportional to 120,859, 181,158.90 and 58,391.80 is: 87,525.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,859 : 181,158.90 = 58,391.80 : x
  2. Step 2: Convert to fraction form
    120,859/181,158.90 = 58,391.80/x
  3. Step 3: Cross multiply
    120,859x = 181,158.90 × 58,391.80
  4. Step 4: Simplify right side
    120,859x = 10,578,194,257.02
  5. Step 5: Solve for x
    x = 10,578,194,257.02/120,859
  6. Step 6: Final answer
    x = 87,525.09

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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.