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Finding the Fourth Proportional to 79,242.56, 118,871.19 and 28,654.24

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Solution

The fourth proportional to 79,242.56, 118,871.19 and 28,654.24 is: 42,984.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,242.56 : 118,871.19 = 28,654.24 : x
  2. Step 2: Convert to fraction form
    79,242.56/118,871.19 = 28,654.24/x
  3. Step 3: Cross multiply
    79,242.56x = 118,871.19 × 28,654.24
  4. Step 4: Simplify right side
    79,242.56x = 3,406,163,607.35
  5. Step 5: Solve for x
    x = 3,406,163,607.35/79,242.56
  6. Step 6: Final answer
    x = 42,984.02

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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.