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Finding the Fourth Proportional to 208,622.69, 312,990.21 and 107,365.58

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Solution

The fourth proportional to 208,622.69, 312,990.21 and 107,365.58 is: 161,077.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,622.69 : 312,990.21 = 107,365.58 : x
  2. Step 2: Convert to fraction form
    208,622.69/312,990.21 = 107,365.58/x
  3. Step 3: Cross multiply
    208,622.69x = 312,990.21 × 107,365.58
  4. Step 4: Simplify right side
    208,622.69x = 33,604,376,213.45
  5. Step 5: Solve for x
    x = 33,604,376,213.45/208,622.69
  6. Step 6: Final answer
    x = 161,077.28

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1.5x scale

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.