Home / 205,270.60-307,905.90-126,128.20

Finding the Fourth Proportional to 205,270.60, 307,905.90 and 126,128.20

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Solution

The fourth proportional to 205,270.60, 307,905.90 and 126,128.20 is: 189,192.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    205,270.60 : 307,905.90 = 126,128.20 : x
  2. Step 2: Convert to fraction form
    205,270.60/307,905.90 = 126,128.20/x
  3. Step 3: Cross multiply
    205,270.60x = 307,905.90 × 126,128.20
  4. Step 4: Simplify right side
    205,270.60x = 38,835,616,936.38
  5. Step 5: Solve for x
    x = 38,835,616,936.38/205,270.60
  6. Step 6: Final answer
    x = 189,192.30

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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.