Home / 78,631.60-117,996-31,884.88

Finding the Fourth Proportional to 78,631.60, 117,996 and 31,884.88

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Solution

The fourth proportional to 78,631.60, 117,996 and 31,884.88 is: 47,847.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,631.60 : 117,996 = 31,884.88 : x
  2. Step 2: Convert to fraction form
    78,631.60/117,996 = 31,884.88/x
  3. Step 3: Cross multiply
    78,631.60x = 117,996 × 31,884.88
  4. Step 4: Simplify right side
    78,631.60x = 3,762,288,300.48
  5. Step 5: Solve for x
    x = 3,762,288,300.48/78,631.60
  6. Step 6: Final answer
    x = 47,847.03

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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.