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Finding the Fourth Proportional to 79,691.68, 119,425.64 and 62,978.24

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Solution

The fourth proportional to 79,691.68, 119,425.64 and 62,978.24 is: 94,378.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,691.68 : 119,425.64 = 62,978.24 : x
  2. Step 2: Convert to fraction form
    79,691.68/119,425.64 = 62,978.24/x
  3. Step 3: Cross multiply
    79,691.68x = 119,425.64 × 62,978.24
  4. Step 4: Simplify right side
    79,691.68x = 7,521,216,618.07
  5. Step 5: Solve for x
    x = 7,521,216,618.07/79,691.68
  6. Step 6: Final answer
    x = 94,378.94

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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.