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Finding the Fourth Proportional to 92,961.76, 128,281.96 and 50,520

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Solution

The fourth proportional to 92,961.76, 128,281.96 and 50,520 is: 69,714.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,961.76 : 128,281.96 = 50,520 : x
  2. Step 2: Convert to fraction form
    92,961.76/128,281.96 = 50,520/x
  3. Step 3: Cross multiply
    92,961.76x = 128,281.96 × 50,520
  4. Step 4: Simplify right side
    92,961.76x = 6,480,804,619.20
  5. Step 5: Solve for x
    x = 6,480,804,619.20/92,961.76
  6. Step 6: Final answer
    x = 69,714.74

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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.