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Finding the Fourth Proportional to 92,994.10, 128,393.62 and 71,445.44

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Solution

The fourth proportional to 92,994.10, 128,393.62 and 71,445.44 is: 98,642.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,994.10 : 128,393.62 = 71,445.44 : x
  2. Step 2: Convert to fraction form
    92,994.10/128,393.62 = 71,445.44/x
  3. Step 3: Cross multiply
    92,994.10x = 128,393.62 × 71,445.44
  4. Step 4: Simplify right side
    92,994.10x = 9,173,138,674.09
  5. Step 5: Solve for x
    x = 9,173,138,674.09/92,994.10
  6. Step 6: Final answer
    x = 98,642.16

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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.