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Finding the Fourth Proportional to 138,689.96, 191,330.40 and 82,068.56

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Solution

The fourth proportional to 138,689.96, 191,330.40 and 82,068.56 is: 113,218.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,689.96 : 191,330.40 = 82,068.56 : x
  2. Step 2: Convert to fraction form
    138,689.96/191,330.40 = 82,068.56/x
  3. Step 3: Cross multiply
    138,689.96x = 191,330.40 × 82,068.56
  4. Step 4: Simplify right side
    138,689.96x = 15,702,210,412.22
  5. Step 5: Solve for x
    x = 15,702,210,412.22/138,689.96
  6. Step 6: Final answer
    x = 113,218.08

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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.