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Finding the Fourth Proportional to 136,672.40, 205,008.60 and 83,910.80

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Solution

The fourth proportional to 136,672.40, 205,008.60 and 83,910.80 is: 125,866.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    136,672.40 : 205,008.60 = 83,910.80 : x
  2. Step 2: Convert to fraction form
    136,672.40/205,008.60 = 83,910.80/x
  3. Step 3: Cross multiply
    136,672.40x = 205,008.60 × 83,910.80
  4. Step 4: Simplify right side
    136,672.40x = 17,202,435,632.88
  5. Step 5: Solve for x
    x = 17,202,435,632.88/136,672.40
  6. Step 6: Final answer
    x = 125,866.20

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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.