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Finding the Fourth Proportional to 78,607.70, 117,925.91 and 36,481.98

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Solution

The fourth proportional to 78,607.70, 117,925.91 and 36,481.98 is: 54,729.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,607.70 : 117,925.91 = 36,481.98 : x
  2. Step 2: Convert to fraction form
    78,607.70/117,925.91 = 36,481.98/x
  3. Step 3: Cross multiply
    78,607.70x = 117,925.91 × 36,481.98
  4. Step 4: Simplify right side
    78,607.70x = 4,302,170,065.47
  5. Step 5: Solve for x
    x = 4,302,170,065.47/78,607.70
  6. Step 6: Final answer
    x = 54,729.63

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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.