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Finding the Fourth Proportional to 79,980.50, 110,356.11 and 47,706.54

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Solution

The fourth proportional to 79,980.50, 110,356.11 and 47,706.54 is: 65,824.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,980.50 : 110,356.11 = 47,706.54 : x
  2. Step 2: Convert to fraction form
    79,980.50/110,356.11 = 47,706.54/x
  3. Step 3: Cross multiply
    79,980.50x = 110,356.11 × 47,706.54
  4. Step 4: Simplify right side
    79,980.50x = 5,264,708,175.96
  5. Step 5: Solve for x
    x = 5,264,708,175.96/79,980.50
  6. Step 6: Final answer
    x = 65,824.90

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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.