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Finding the Fourth Proportional to 205,709.86, 283,905.90 and 115,070.86

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Solution

The fourth proportional to 205,709.86, 283,905.90 and 115,070.86 is: 158,812.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,709.86 : 283,905.90 = 115,070.86 : x
  2. Step 2: Convert to fraction form
    205,709.86/283,905.90 = 115,070.86/x
  3. Step 3: Cross multiply
    205,709.86x = 283,905.90 × 115,070.86
  4. Step 4: Simplify right side
    205,709.86x = 32,669,296,072.07
  5. Step 5: Solve for x
    x = 32,669,296,072.07/205,709.86
  6. Step 6: Final answer
    x = 158,812.49

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.