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Finding the Fourth Proportional to 98,777.66, 136,039.64 and 85,344.62

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Solution

The fourth proportional to 98,777.66, 136,039.64 and 85,344.62 is: 117,539.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    98,777.66 : 136,039.64 = 85,344.62 : x
  2. Step 2: Convert to fraction form
    98,777.66/136,039.64 = 85,344.62/x
  3. Step 3: Cross multiply
    98,777.66x = 136,039.64 × 85,344.62
  4. Step 4: Simplify right side
    98,777.66x = 11,610,251,380.74
  5. Step 5: Solve for x
    x = 11,610,251,380.74/98,777.66
  6. Step 6: Final answer
    x = 117,539.24

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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.