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Finding the Fourth Proportional to 118,614.50, 163,688.13 and 68,313.62

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Solution

The fourth proportional to 118,614.50, 163,688.13 and 68,313.62 is: 94,272.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,614.50 : 163,688.13 = 68,313.62 : x
  2. Step 2: Convert to fraction form
    118,614.50/163,688.13 = 68,313.62/x
  3. Step 3: Cross multiply
    118,614.50x = 163,688.13 × 68,313.62
  4. Step 4: Simplify right side
    118,614.50x = 11,182,128,711.33
  5. Step 5: Solve for x
    x = 11,182,128,711.33/118,614.50
  6. Step 6: Final answer
    x = 94,272.86

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.