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Finding the Fourth Proportional to 132,638.90, 198,938.57 and 48,379.28

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Solution

The fourth proportional to 132,638.90, 198,938.57 and 48,379.28 is: 72,561.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,638.90 : 198,938.57 = 48,379.28 : x
  2. Step 2: Convert to fraction form
    132,638.90/198,938.57 = 48,379.28/x
  3. Step 3: Cross multiply
    132,638.90x = 198,938.57 × 48,379.28
  4. Step 4: Simplify right side
    132,638.90x = 9,624,503,544.24
  5. Step 5: Solve for x
    x = 9,624,503,544.24/132,638.90
  6. Step 6: Final answer
    x = 72,561.70

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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.