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Finding the Fourth Proportional to 132,129.80, 198,194.70 and 84,890.60

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Solution

The fourth proportional to 132,129.80, 198,194.70 and 84,890.60 is: 127,335.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,129.80 : 198,194.70 = 84,890.60 : x
  2. Step 2: Convert to fraction form
    132,129.80/198,194.70 = 84,890.60/x
  3. Step 3: Cross multiply
    132,129.80x = 198,194.70 × 84,890.60
  4. Step 4: Simplify right side
    132,129.80x = 16,824,866,999.82
  5. Step 5: Solve for x
    x = 16,824,866,999.82/132,129.80
  6. Step 6: Final answer
    x = 127,335.90

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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.