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Finding the Fourth Proportional to 134,039.80, 201,059.70 and 81,465.40

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Solution

The fourth proportional to 134,039.80, 201,059.70 and 81,465.40 is: 122,198.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,039.80 : 201,059.70 = 81,465.40 : x
  2. Step 2: Convert to fraction form
    134,039.80/201,059.70 = 81,465.40/x
  3. Step 3: Cross multiply
    134,039.80x = 201,059.70 × 81,465.40
  4. Step 4: Simplify right side
    134,039.80x = 16,379,408,884.38
  5. Step 5: Solve for x
    x = 16,379,408,884.38/134,039.80
  6. Step 6: Final answer
    x = 122,198.10

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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.