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Finding the Fourth Proportional to 78,080.62, 117,096.76 and 28,154.30

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Solution

The fourth proportional to 78,080.62, 117,096.76 and 28,154.30 is: 42,222.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    78,080.62 : 117,096.76 = 28,154.30 : x
  2. Step 2: Convert to fraction form
    78,080.62/117,096.76 = 28,154.30/x
  3. Step 3: Cross multiply
    78,080.62x = 117,096.76 × 28,154.30
  4. Step 4: Simplify right side
    78,080.62x = 3,296,777,310.07
  5. Step 5: Solve for x
    x = 3,296,777,310.07/78,080.62
  6. Step 6: Final answer
    x = 42,222.73

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1.5x scale

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.