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Finding the Fourth Proportional to 134,006.30, 201,009.45 and 81,431.90

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Solution

The fourth proportional to 134,006.30, 201,009.45 and 81,431.90 is: 122,147.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,006.30 : 201,009.45 = 81,431.90 : x
  2. Step 2: Convert to fraction form
    134,006.30/201,009.45 = 81,431.90/x
  3. Step 3: Cross multiply
    134,006.30x = 201,009.45 × 81,431.90
  4. Step 4: Simplify right side
    134,006.30x = 16,368,581,431.46
  5. Step 5: Solve for x
    x = 16,368,581,431.46/134,006.30
  6. Step 6: Final answer
    x = 122,147.85

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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.