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Finding the Fourth Proportional to 134,156.20, 201,363.90 and 81,668.20

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Solution

The fourth proportional to 134,156.20, 201,363.90 and 81,668.20 is: 122,581.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,156.20 : 201,363.90 = 81,668.20 : x
  2. Step 2: Convert to fraction form
    134,156.20/201,363.90 = 81,668.20/x
  3. Step 3: Cross multiply
    134,156.20x = 201,363.90 × 81,668.20
  4. Step 4: Simplify right side
    134,156.20x = 16,445,027,257.98
  5. Step 5: Solve for x
    x = 16,445,027,257.98/134,156.20
  6. Step 6: Final answer
    x = 122,581.19

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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.