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Finding the Fourth Proportional to 78,930.60, 118,292.22 and 37,389.48

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Solution

The fourth proportional to 78,930.60, 118,292.22 and 37,389.48 is: 56,035.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,930.60 : 118,292.22 = 37,389.48 : x
  2. Step 2: Convert to fraction form
    78,930.60/118,292.22 = 37,389.48/x
  3. Step 3: Cross multiply
    78,930.60x = 118,292.22 × 37,389.48
  4. Step 4: Simplify right side
    78,930.60x = 4,422,884,593.85
  5. Step 5: Solve for x
    x = 4,422,884,593.85/78,930.60
  6. Step 6: Final answer
    x = 56,035.11

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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.