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Finding the Fourth Proportional to 92,405.90, 129,630.70 and 92,405.90

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Solution

The fourth proportional to 92,405.90, 129,630.70 and 92,405.90 is: 129,630.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,405.90 : 129,630.70 = 92,405.90 : x
  2. Step 2: Convert to fraction form
    92,405.90/129,630.70 = 92,405.90/x
  3. Step 3: Cross multiply
    92,405.90x = 129,630.70 × 92,405.90
  4. Step 4: Simplify right side
    92,405.90x = 11,978,641,501.13
  5. Step 5: Solve for x
    x = 11,978,641,501.13/92,405.90
  6. Step 6: Final answer
    x = 129,630.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.