Home / 205,239.34-307,905.18-72,128.80

Finding the Fourth Proportional to 205,239.34, 307,905.18 and 72,128.80

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Solution

The fourth proportional to 205,239.34, 307,905.18 and 72,128.80 is: 108,209.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,239.34 : 307,905.18 = 72,128.80 : x
  2. Step 2: Convert to fraction form
    205,239.34/307,905.18 = 72,128.80/x
  3. Step 3: Cross multiply
    205,239.34x = 307,905.18 × 72,128.80
  4. Step 4: Simplify right side
    205,239.34x = 22,208,831,147.18
  5. Step 5: Solve for x
    x = 22,208,831,147.18/205,239.34
  6. Step 6: Final answer
    x = 108,209.43

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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.