Home / 203,425.02-305,095.78-77,021.76

Finding the Fourth Proportional to 203,425.02, 305,095.78 and 77,021.76

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Solution

The fourth proportional to 203,425.02, 305,095.78 and 77,021.76 is: 115,516.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    203,425.02 : 305,095.78 = 77,021.76 : x
  2. Step 2: Convert to fraction form
    203,425.02/305,095.78 = 77,021.76/x
  3. Step 3: Cross multiply
    203,425.02x = 305,095.78 × 77,021.76
  4. Step 4: Simplify right side
    203,425.02x = 23,499,013,944.17
  5. Step 5: Solve for x
    x = 23,499,013,944.17/203,425.02
  6. Step 6: Final answer
    x = 115,516.83

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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.