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Finding the Fourth Proportional to 118,781.91, 163,912.68 and 65,056.77

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Solution

The fourth proportional to 118,781.91, 163,912.68 and 65,056.77 is: 89,774.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    118,781.91 : 163,912.68 = 65,056.77 : x
  2. Step 2: Convert to fraction form
    118,781.91/163,912.68 = 65,056.77/x
  3. Step 3: Cross multiply
    118,781.91x = 163,912.68 × 65,056.77
  4. Step 4: Simplify right side
    118,781.91x = 10,663,629,522.84
  5. Step 5: Solve for x
    x = 10,663,629,522.84/118,781.91
  6. Step 6: Final answer
    x = 89,774.86

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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.