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Finding the Fourth Proportional to 140,043.56, 209,928.65 and 55,778.45

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Solution

The fourth proportional to 140,043.56, 209,928.65 and 55,778.45 is: 83,613.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,043.56 : 209,928.65 = 55,778.45 : x
  2. Step 2: Convert to fraction form
    140,043.56/209,928.65 = 55,778.45/x
  3. Step 3: Cross multiply
    140,043.56x = 209,928.65 × 55,778.45
  4. Step 4: Simplify right side
    140,043.56x = 11,709,493,379.06
  5. Step 5: Solve for x
    x = 11,709,493,379.06/140,043.56
  6. Step 6: Final answer
    x = 83,613.23

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1.5x scale

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.