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Finding the Fourth Proportional to 168,421.28, 252,412.53 and 68,464.71

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Solution

The fourth proportional to 168,421.28, 252,412.53 and 68,464.71 is: 102,607.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    168,421.28 : 252,412.53 = 68,464.71 : x
  2. Step 2: Convert to fraction form
    168,421.28/252,412.53 = 68,464.71/x
  3. Step 3: Cross multiply
    168,421.28x = 252,412.53 × 68,464.71
  4. Step 4: Simplify right side
    168,421.28x = 17,281,350,666.82
  5. Step 5: Solve for x
    x = 17,281,350,666.82/168,421.28
  6. Step 6: Final answer
    x = 102,607.88

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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.