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Finding the Fourth Proportional to 78,969.60, 118,350.66 and 37,428.48

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Solution

The fourth proportional to 78,969.60, 118,350.66 and 37,428.48 is: 56,093.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,969.60 : 118,350.66 = 37,428.48 : x
  2. Step 2: Convert to fraction form
    78,969.60/118,350.66 = 37,428.48/x
  3. Step 3: Cross multiply
    78,969.60x = 118,350.66 × 37,428.48
  4. Step 4: Simplify right side
    78,969.60x = 4,429,685,310.80
  5. Step 5: Solve for x
    x = 4,429,685,310.80/78,969.60
  6. Step 6: Final answer
    x = 56,093.55

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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.