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Finding the Fourth Proportional to 92,693.61, 138,932.91 and 42,668.64

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Solution

The fourth proportional to 92,693.61, 138,932.91 and 42,668.64 is: 63,953.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,693.61 : 138,932.91 = 42,668.64 : x
  2. Step 2: Convert to fraction form
    92,693.61/138,932.91 = 42,668.64/x
  3. Step 3: Cross multiply
    92,693.61x = 138,932.91 × 42,668.64
  4. Step 4: Simplify right side
    92,693.61x = 5,928,078,320.94
  5. Step 5: Solve for x
    x = 5,928,078,320.94/92,693.61
  6. Step 6: Final answer
    x = 63,953.47

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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.