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Finding the Fourth Proportional to 134,638.60, 201,957.90 and 39,872.20

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Solution

The fourth proportional to 134,638.60, 201,957.90 and 39,872.20 is: 59,808.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,638.60 : 201,957.90 = 39,872.20 : x
  2. Step 2: Convert to fraction form
    134,638.60/201,957.90 = 39,872.20/x
  3. Step 3: Cross multiply
    134,638.60x = 201,957.90 × 39,872.20
  4. Step 4: Simplify right side
    134,638.60x = 8,052,505,780.38
  5. Step 5: Solve for x
    x = 8,052,505,780.38/134,638.60
  6. Step 6: Final answer
    x = 59,808.30

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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.