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Finding the Fourth Proportional to 92,731.14, 139,124.43 and 65,765.43

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Solution

The fourth proportional to 92,731.14, 139,124.43 and 65,765.43 is: 98,667.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,731.14 : 139,124.43 = 65,765.43 : x
  2. Step 2: Convert to fraction form
    92,731.14/139,124.43 = 65,765.43/x
  3. Step 3: Cross multiply
    92,731.14x = 139,124.43 × 65,765.43
  4. Step 4: Simplify right side
    92,731.14x = 9,149,577,962.45
  5. Step 5: Solve for x
    x = 9,149,577,962.45/92,731.14
  6. Step 6: Final answer
    x = 98,667.80

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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.