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Finding the Fourth Proportional to 76,425.40, 114,540.90 and 68,066.20

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Solution

The fourth proportional to 76,425.40, 114,540.90 and 68,066.20 is: 102,012.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    76,425.40 : 114,540.90 = 68,066.20 : x
  2. Step 2: Convert to fraction form
    76,425.40/114,540.90 = 68,066.20/x
  3. Step 3: Cross multiply
    76,425.40x = 114,540.90 × 68,066.20
  4. Step 4: Simplify right side
    76,425.40x = 7,796,363,807.58
  5. Step 5: Solve for x
    x = 7,796,363,807.58/76,425.40
  6. Step 6: Final answer
    x = 102,012.73

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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.