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Finding the Fourth Proportional to 68,487.39, 102,763.67 and 47,459.79

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Solution

The fourth proportional to 68,487.39, 102,763.67 and 47,459.79 is: 71,212.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,487.39 : 102,763.67 = 47,459.79 : x
  2. Step 2: Convert to fraction form
    68,487.39/102,763.67 = 47,459.79/x
  3. Step 3: Cross multiply
    68,487.39x = 102,763.67 × 47,459.79
  4. Step 4: Simplify right side
    68,487.39x = 4,877,141,960.53
  5. Step 5: Solve for x
    x = 4,877,141,960.53/68,487.39
  6. Step 6: Final answer
    x = 71,212.26

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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.