Home / 80,672.62-111,135.52-56,428.32

Finding the Fourth Proportional to 80,672.62, 111,135.52 and 56,428.32

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Solution

The fourth proportional to 80,672.62, 111,135.52 and 56,428.32 is: 77,736.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    80,672.62 : 111,135.52 = 56,428.32 : x
  2. Step 2: Convert to fraction form
    80,672.62/111,135.52 = 56,428.32/x
  3. Step 3: Cross multiply
    80,672.62x = 111,135.52 × 56,428.32
  4. Step 4: Simplify right side
    80,672.62x = 6,271,190,442.30
  5. Step 5: Solve for x
    x = 6,271,190,442.30/80,672.62
  6. Step 6: Final answer
    x = 77,736.29

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1.5x scale

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.