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Finding the Fourth Proportional to 132,438.80, 198,485.40 and 61,353.20

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Solution

The fourth proportional to 132,438.80, 198,485.40 and 61,353.20 is: 91,949.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,438.80 : 198,485.40 = 61,353.20 : x
  2. Step 2: Convert to fraction form
    132,438.80/198,485.40 = 61,353.20/x
  3. Step 3: Cross multiply
    132,438.80x = 198,485.40 × 61,353.20
  4. Step 4: Simplify right side
    132,438.80x = 12,177,714,443.28
  5. Step 5: Solve for x
    x = 12,177,714,443.28/132,438.80
  6. Step 6: Final answer
    x = 91,949.75

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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.