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Finding the Fourth Proportional to 92,978.73, 128,314.47 and 52,692.06

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Solution

The fourth proportional to 92,978.73, 128,314.47 and 52,692.06 is: 72,717.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,978.73 : 128,314.47 = 52,692.06 : x
  2. Step 2: Convert to fraction form
    92,978.73/128,314.47 = 52,692.06/x
  3. Step 3: Cross multiply
    92,978.73x = 128,314.47 × 52,692.06
  4. Step 4: Simplify right side
    92,978.73x = 6,761,153,752.11
  5. Step 5: Solve for x
    x = 6,761,153,752.11/92,978.73
  6. Step 6: Final answer
    x = 72,717.21

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.