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Finding the Fourth Proportional to 79,772.70, 110,090.64 and 45,780.90

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Solution

The fourth proportional to 79,772.70, 110,090.64 and 45,780.90 is: 63,180.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,772.70 : 110,090.64 = 45,780.90 : x
  2. Step 2: Convert to fraction form
    79,772.70/110,090.64 = 45,780.90/x
  3. Step 3: Cross multiply
    79,772.70x = 110,090.64 × 45,780.90
  4. Step 4: Simplify right side
    79,772.70x = 5,040,048,339.61
  5. Step 5: Solve for x
    x = 5,040,048,339.61/79,772.70
  6. Step 6: Final answer
    x = 63,180.12

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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.