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Finding the Fourth Proportional to 135,312.16, 186,733.20 and 81,600.16

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Solution

The fourth proportional to 135,312.16, 186,733.20 and 81,600.16 is: 112,609.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,312.16 : 186,733.20 = 81,600.16 : x
  2. Step 2: Convert to fraction form
    135,312.16/186,733.20 = 81,600.16/x
  3. Step 3: Cross multiply
    135,312.16x = 186,733.20 × 81,600.16
  4. Step 4: Simplify right side
    135,312.16x = 15,237,458,997.31
  5. Step 5: Solve for x
    x = 15,237,458,997.31/135,312.16
  6. Step 6: Final answer
    x = 112,609.68

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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.