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Finding the Fourth Proportional to 120,904.80, 181,357.20 and 92,878.80

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Solution

The fourth proportional to 120,904.80, 181,357.20 and 92,878.80 is: 139,318.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,904.80 : 181,357.20 = 92,878.80 : x
  2. Step 2: Convert to fraction form
    120,904.80/181,357.20 = 92,878.80/x
  3. Step 3: Cross multiply
    120,904.80x = 181,357.20 × 92,878.80
  4. Step 4: Simplify right side
    120,904.80x = 16,844,239,107.36
  5. Step 5: Solve for x
    x = 16,844,239,107.36/120,904.80
  6. Step 6: Final answer
    x = 139,318.20

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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.