Home / 120,982.80-181,490.40-42,121.20

Finding the Fourth Proportional to 120,982.80, 181,490.40 and 42,121.20

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Solution

The fourth proportional to 120,982.80, 181,490.40 and 42,121.20 is: 63,187.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,982.80 : 181,490.40 = 42,121.20 : x
  2. Step 2: Convert to fraction form
    120,982.80/181,490.40 = 42,121.20/x
  3. Step 3: Cross multiply
    120,982.80x = 181,490.40 × 42,121.20
  4. Step 4: Simplify right side
    120,982.80x = 7,644,593,436.48
  5. Step 5: Solve for x
    x = 7,644,593,436.48/120,982.80
  6. Step 6: Final answer
    x = 63,187.44

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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.