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Finding the Fourth Proportional to 132,466.80, 198,700.20 and 85,772.40

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Solution

The fourth proportional to 132,466.80, 198,700.20 and 85,772.40 is: 128,658.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,466.80 : 198,700.20 = 85,772.40 : x
  2. Step 2: Convert to fraction form
    132,466.80/198,700.20 = 85,772.40/x
  3. Step 3: Cross multiply
    132,466.80x = 198,700.20 × 85,772.40
  4. Step 4: Simplify right side
    132,466.80x = 17,042,993,034.48
  5. Step 5: Solve for x
    x = 17,042,993,034.48/132,466.80
  6. Step 6: Final answer
    x = 128,658.60

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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.