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Finding the Fourth Proportional to 92,685.72, 139,029.28 and 60,691.72

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Solution

The fourth proportional to 92,685.72, 139,029.28 and 60,691.72 is: 91,038.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,685.72 : 139,029.28 = 60,691.72 : x
  2. Step 2: Convert to fraction form
    92,685.72/139,029.28 = 60,691.72/x
  3. Step 3: Cross multiply
    92,685.72x = 139,029.28 × 60,691.72
  4. Step 4: Simplify right side
    92,685.72x = 8,437,926,133.56
  5. Step 5: Solve for x
    x = 8,437,926,133.56/92,685.72
  6. Step 6: Final answer
    x = 91,038.04

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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.