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Finding the Fourth Proportional to 140,962.60, 211,479.90 and 99,490.60

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Solution

The fourth proportional to 140,962.60, 211,479.90 and 99,490.60 is: 149,261.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,962.60 : 211,479.90 = 99,490.60 : x
  2. Step 2: Convert to fraction form
    140,962.60/211,479.90 = 99,490.60/x
  3. Step 3: Cross multiply
    140,962.60x = 211,479.90 × 99,490.60
  4. Step 4: Simplify right side
    140,962.60x = 21,040,262,138.94
  5. Step 5: Solve for x
    x = 21,040,262,138.94/140,962.60
  6. Step 6: Final answer
    x = 149,261.31

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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.