Home / 132,429.60-198,644.40-90,439.20

Finding the Fourth Proportional to 132,429.60, 198,644.40 and 90,439.20

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Solution

The fourth proportional to 132,429.60, 198,644.40 and 90,439.20 is: 135,658.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,429.60 : 198,644.40 = 90,439.20 : x
  2. Step 2: Convert to fraction form
    132,429.60/198,644.40 = 90,439.20/x
  3. Step 3: Cross multiply
    132,429.60x = 198,644.40 × 90,439.20
  4. Step 4: Simplify right side
    132,429.60x = 17,965,240,620.48
  5. Step 5: Solve for x
    x = 17,965,240,620.48/132,429.60
  6. Step 6: Final answer
    x = 135,658.80

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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.