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Finding the Fourth Proportional to 101,630, 140,249.40 and 56,918

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Solution

The fourth proportional to 101,630, 140,249.40 and 56,918 is: 78,546.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,630 : 140,249.40 = 56,918 : x
  2. Step 2: Convert to fraction form
    101,630/140,249.40 = 56,918/x
  3. Step 3: Cross multiply
    101,630x = 140,249.40 × 56,918
  4. Step 4: Simplify right side
    101,630x = 7,982,715,349.20
  5. Step 5: Solve for x
    x = 7,982,715,349.20/101,630
  6. Step 6: Final answer
    x = 78,546.84

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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.