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Finding the Fourth Proportional to 140,672.59, 210,964.80 and 40,839.68

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Solution

The fourth proportional to 140,672.59, 210,964.80 and 40,839.68 is: 61,246.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    140,672.59 : 210,964.80 = 40,839.68 : x
  2. Step 2: Convert to fraction form
    140,672.59/210,964.80 = 40,839.68/x
  3. Step 3: Cross multiply
    140,672.59x = 210,964.80 × 40,839.68
  4. Step 4: Simplify right side
    140,672.59x = 8,615,734,923.26
  5. Step 5: Solve for x
    x = 8,615,734,923.26/140,672.59
  6. Step 6: Final answer
    x = 61,246.72

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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.