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Finding the Fourth Proportional to 78,498.40, 117,645.20 and 36,373.60

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Solution

The fourth proportional to 78,498.40, 117,645.20 and 36,373.60 is: 54,512.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,498.40 : 117,645.20 = 36,373.60 : x
  2. Step 2: Convert to fraction form
    78,498.40/117,645.20 = 36,373.60/x
  3. Step 3: Cross multiply
    78,498.40x = 117,645.20 × 36,373.60
  4. Step 4: Simplify right side
    78,498.40x = 4,279,179,446.72
  5. Step 5: Solve for x
    x = 4,279,179,446.72/78,498.40
  6. Step 6: Final answer
    x = 54,512.95

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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.