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Finding the Fourth Proportional to 142,412.98, 213,651.78 and 75,818.02

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Solution

The fourth proportional to 142,412.98, 213,651.78 and 75,818.02 is: 113,744.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,412.98 : 213,651.78 = 75,818.02 : x
  2. Step 2: Convert to fraction form
    142,412.98/213,651.78 = 75,818.02/x
  3. Step 3: Cross multiply
    142,412.98x = 213,651.78 × 75,818.02
  4. Step 4: Simplify right side
    142,412.98x = 16,198,654,929.08
  5. Step 5: Solve for x
    x = 16,198,654,929.08/142,412.98
  6. Step 6: Final answer
    x = 113,744.23

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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.