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Finding the Fourth Proportional to 140,991.60, 211,516.20 and 47,506.80

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Solution

The fourth proportional to 140,991.60, 211,516.20 and 47,506.80 is: 71,269.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,991.60 : 211,516.20 = 47,506.80 : x
  2. Step 2: Convert to fraction form
    140,991.60/211,516.20 = 47,506.80/x
  3. Step 3: Cross multiply
    140,991.60x = 211,516.20 × 47,506.80
  4. Step 4: Simplify right side
    140,991.60x = 10,048,457,810.16
  5. Step 5: Solve for x
    x = 10,048,457,810.16/140,991.60
  6. Step 6: Final answer
    x = 71,269.90

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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.