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Finding the Fourth Proportional to 140,672.80, 210,976.08 and 40,806.64

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Solution

The fourth proportional to 140,672.80, 210,976.08 and 40,806.64 is: 61,200.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,672.80 : 210,976.08 = 40,806.64 : x
  2. Step 2: Convert to fraction form
    140,672.80/210,976.08 = 40,806.64/x
  3. Step 3: Cross multiply
    140,672.80x = 210,976.08 × 40,806.64
  4. Step 4: Simplify right side
    140,672.80x = 8,609,224,945.17
  5. Step 5: Solve for x
    x = 8,609,224,945.17/140,672.80
  6. Step 6: Final answer
    x = 61,200.35

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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.