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Finding the Fourth Proportional to 132,696.60, 183,136.43 and 78,981.78

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Solution

The fourth proportional to 132,696.60, 183,136.43 and 78,981.78 is: 109,003.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,696.60 : 183,136.43 = 78,981.78 : x
  2. Step 2: Convert to fraction form
    132,696.60/183,136.43 = 78,981.78/x
  3. Step 3: Cross multiply
    132,696.60x = 183,136.43 × 78,981.78
  4. Step 4: Simplify right side
    132,696.60x = 14,464,441,224.25
  5. Step 5: Solve for x
    x = 14,464,441,224.25/132,696.60
  6. Step 6: Final answer
    x = 109,003.86

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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.