Home / 278,865.25-418,223.15-121,056.19

Finding the Fourth Proportional to 278,865.25, 418,223.15 and 121,056.19

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Solution

The fourth proportional to 278,865.25, 418,223.15 and 121,056.19 is: 181,551.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,865.25 : 418,223.15 = 121,056.19 : x
  2. Step 2: Convert to fraction form
    278,865.25/418,223.15 = 121,056.19/x
  3. Step 3: Cross multiply
    278,865.25x = 418,223.15 × 121,056.19
  4. Step 4: Simplify right side
    278,865.25x = 50,628,499,911.92
  5. Step 5: Solve for x
    x = 50,628,499,911.92/278,865.25
  6. Step 6: Final answer
    x = 181,551.84

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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.