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Finding the Fourth Proportional to 92,658.28, 138,960.16 and 42,028.02

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Solution

The fourth proportional to 92,658.28, 138,960.16 and 42,028.02 is: 63,029.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,658.28 : 138,960.16 = 42,028.02 : x
  2. Step 2: Convert to fraction form
    92,658.28/138,960.16 = 42,028.02/x
  3. Step 3: Cross multiply
    92,658.28x = 138,960.16 × 42,028.02
  4. Step 4: Simplify right side
    92,658.28x = 5,840,219,478.74
  5. Step 5: Solve for x
    x = 5,840,219,478.74/92,658.28
  6. Step 6: Final answer
    x = 63,029.66

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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.