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Finding the Fourth Proportional to 140,681.88, 211,056.38 and 45,912.24

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Solution

The fourth proportional to 140,681.88, 211,056.38 and 45,912.24 is: 68,879.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,681.88 : 211,056.38 = 45,912.24 : x
  2. Step 2: Convert to fraction form
    140,681.88/211,056.38 = 45,912.24/x
  3. Step 3: Cross multiply
    140,681.88x = 211,056.38 × 45,912.24
  4. Step 4: Simplify right side
    140,681.88x = 9,690,071,172.09
  5. Step 5: Solve for x
    x = 9,690,071,172.09/140,681.88
  6. Step 6: Final answer
    x = 68,879.31

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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.