Home / 138,910.40-208,285.14-122,303.78

Finding the Fourth Proportional to 138,910.40, 208,285.14 and 122,303.78

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Solution

The fourth proportional to 138,910.40, 208,285.14 and 122,303.78 is: 183,384.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,910.40 : 208,285.14 = 122,303.78 : x
  2. Step 2: Convert to fraction form
    138,910.40/208,285.14 = 122,303.78/x
  3. Step 3: Cross multiply
    138,910.40x = 208,285.14 × 122,303.78
  4. Step 4: Simplify right side
    138,910.40x = 25,474,059,939.83
  5. Step 5: Solve for x
    x = 25,474,059,939.83/138,910.40
  6. Step 6: Final answer
    x = 183,384.83

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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.