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Finding the Fourth Proportional to 68,430.92, 102,657.38 and 28,988.37

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Solution

The fourth proportional to 68,430.92, 102,657.38 and 28,988.37 is: 43,487.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,430.92 : 102,657.38 = 28,988.37 : x
  2. Step 2: Convert to fraction form
    68,430.92/102,657.38 = 28,988.37/x
  3. Step 3: Cross multiply
    68,430.92x = 102,657.38 × 28,988.37
  4. Step 4: Simplify right side
    68,430.92x = 2,975,869,969.73
  5. Step 5: Solve for x
    x = 2,975,869,969.73/68,430.92
  6. Step 6: Final answer
    x = 43,487.22

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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.