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Finding the Fourth Proportional to 92,713.20, 139,215.60 and 53,347.20

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Solution

The fourth proportional to 92,713.20, 139,215.60 and 53,347.20 is: 80,104.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,713.20 : 139,215.60 = 53,347.20 : x
  2. Step 2: Convert to fraction form
    92,713.20/139,215.60 = 53,347.20/x
  3. Step 3: Cross multiply
    92,713.20x = 139,215.60 × 53,347.20
  4. Step 4: Simplify right side
    92,713.20x = 7,426,762,456.32
  5. Step 5: Solve for x
    x = 7,426,762,456.32/92,713.20
  6. Step 6: Final answer
    x = 80,104.69

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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.