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Finding the Fourth Proportional to 134,047.80, 200,898.90 and 81,401.40

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Solution

The fourth proportional to 134,047.80, 200,898.90 and 81,401.40 is: 121,997.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,047.80 : 200,898.90 = 81,401.40 : x
  2. Step 2: Convert to fraction form
    134,047.80/200,898.90 = 81,401.40/x
  3. Step 3: Cross multiply
    134,047.80x = 200,898.90 × 81,401.40
  4. Step 4: Simplify right side
    134,047.80x = 16,353,451,718.46
  5. Step 5: Solve for x
    x = 16,353,451,718.46/134,047.80
  6. Step 6: Final answer
    x = 121,997.17

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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.