Home / 205,476.10-308,273.19-85,509.70

Finding the Fourth Proportional to 205,476.10, 308,273.19 and 85,509.70

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Solution

The fourth proportional to 205,476.10, 308,273.19 and 85,509.70 is: 128,289.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,476.10 : 308,273.19 = 85,509.70 : x
  2. Step 2: Convert to fraction form
    205,476.10/308,273.19 = 85,509.70/x
  3. Step 3: Cross multiply
    205,476.10x = 308,273.19 × 85,509.70
  4. Step 4: Simplify right side
    205,476.10x = 26,360,347,994.94
  5. Step 5: Solve for x
    x = 26,360,347,994.94/205,476.10
  6. Step 6: Final answer
    x = 128,289.12

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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.