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Finding the Fourth Proportional to 92,971.44, 128,153.35 and 85,248.60

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Solution

The fourth proportional to 92,971.44, 128,153.35 and 85,248.60 is: 117,508.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    92,971.44 : 128,153.35 = 85,248.60 : x
  2. Step 2: Convert to fraction form
    92,971.44/128,153.35 = 85,248.60/x
  3. Step 3: Cross multiply
    92,971.44x = 128,153.35 × 85,248.60
  4. Step 4: Simplify right side
    92,971.44x = 10,924,893,672.81
  5. Step 5: Solve for x
    x = 10,924,893,672.81/92,971.44
  6. Step 6: Final answer
    x = 117,508.06

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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.