Home / 122,835.20-183,815.40-85,218.80

Finding the Fourth Proportional to 122,835.20, 183,815.40 and 85,218.80

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Solution

The fourth proportional to 122,835.20, 183,815.40 and 85,218.80 is: 127,524.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,835.20 : 183,815.40 = 85,218.80 : x
  2. Step 2: Convert to fraction form
    122,835.20/183,815.40 = 85,218.80/x
  3. Step 3: Cross multiply
    122,835.20x = 183,815.40 × 85,218.80
  4. Step 4: Simplify right side
    122,835.20x = 15,664,527,809.52
  5. Step 5: Solve for x
    x = 15,664,527,809.52/122,835.20
  6. Step 6: Final answer
    x = 127,524.75

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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.