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Finding the Fourth Proportional to 135,502.84, 203,379.18 and 68,990.89

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Solution

The fourth proportional to 135,502.84, 203,379.18 and 68,990.89 is: 103,549.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,502.84 : 203,379.18 = 68,990.89 : x
  2. Step 2: Convert to fraction form
    135,502.84/203,379.18 = 68,990.89/x
  3. Step 3: Cross multiply
    135,502.84x = 203,379.18 × 68,990.89
  4. Step 4: Simplify right side
    135,502.84x = 14,031,310,635.67
  5. Step 5: Solve for x
    x = 14,031,310,635.67/135,502.84
  6. Step 6: Final answer
    x = 103,549.94

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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.