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Finding the Fourth Proportional to 559,336.14, 839,012.70 and 138,612.42

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Solution

The fourth proportional to 559,336.14, 839,012.70 and 138,612.42 is: 207,920.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    559,336.14 : 839,012.70 = 138,612.42 : x
  2. Step 2: Convert to fraction form
    559,336.14/839,012.70 = 138,612.42/x
  3. Step 3: Cross multiply
    559,336.14x = 839,012.70 × 138,612.42
  4. Step 4: Simplify right side
    559,336.14x = 116,297,580,757.73
  5. Step 5: Solve for x
    x = 116,297,580,757.73/559,336.14
  6. Step 6: Final answer
    x = 207,920.73

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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.