Home / 129,318.20-194,123.10-99,866.60

Finding the Fourth Proportional to 129,318.20, 194,123.10 and 99,866.60

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Solution

The fourth proportional to 129,318.20, 194,123.10 and 99,866.60 is: 149,912.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,318.20 : 194,123.10 = 99,866.60 : x
  2. Step 2: Convert to fraction form
    129,318.20/194,123.10 = 99,866.60/x
  3. Step 3: Cross multiply
    129,318.20x = 194,123.10 × 99,866.60
  4. Step 4: Simplify right side
    129,318.20x = 19,386,413,978.46
  5. Step 5: Solve for x
    x = 19,386,413,978.46/129,318.20
  6. Step 6: Final answer
    x = 149,912.49

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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.