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Finding the Fourth Proportional to 132,136.80, 197,800.20 and 72,790.80

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Solution

The fourth proportional to 132,136.80, 197,800.20 and 72,790.80 is: 108,963.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,136.80 : 197,800.20 = 72,790.80 : x
  2. Step 2: Convert to fraction form
    132,136.80/197,800.20 = 72,790.80/x
  3. Step 3: Cross multiply
    132,136.80x = 197,800.20 × 72,790.80
  4. Step 4: Simplify right side
    132,136.80x = 14,398,034,798.16
  5. Step 5: Solve for x
    x = 14,398,034,798.16/132,136.80
  6. Step 6: Final answer
    x = 108,963.10

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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.