Home / 122,780.60-183,998.10-90,942.20

Finding the Fourth Proportional to 122,780.60, 183,998.10 and 90,942.20

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Solution

The fourth proportional to 122,780.60, 183,998.10 and 90,942.20 is: 136,285.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    122,780.60 : 183,998.10 = 90,942.20 : x
  2. Step 2: Convert to fraction form
    122,780.60/183,998.10 = 90,942.20/x
  3. Step 3: Cross multiply
    122,780.60x = 183,998.10 × 90,942.20
  4. Step 4: Simplify right side
    122,780.60x = 16,733,192,009.82
  5. Step 5: Solve for x
    x = 16,733,192,009.82/122,780.60
  6. Step 6: Final answer
    x = 136,285.31

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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.