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Finding the Fourth Proportional to 92,991.96, 128,342.94 and 56,714.46

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Solution

The fourth proportional to 92,991.96, 128,342.94 and 56,714.46 is: 78,274.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,991.96 : 128,342.94 = 56,714.46 : x
  2. Step 2: Convert to fraction form
    92,991.96/128,342.94 = 56,714.46/x
  3. Step 3: Cross multiply
    92,991.96x = 128,342.94 × 56,714.46
  4. Step 4: Simplify right side
    92,991.96x = 7,278,900,536.91
  5. Step 5: Solve for x
    x = 7,278,900,536.91/92,991.96
  6. Step 6: Final answer
    x = 78,274.51

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1.5x scale

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.