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Finding the Fourth Proportional to 138,597.28, 191,195.52 and 86,905.24

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Solution

The fourth proportional to 138,597.28, 191,195.52 and 86,905.24 is: 119,886.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    138,597.28 : 191,195.52 = 86,905.24 : x
  2. Step 2: Convert to fraction form
    138,597.28/191,195.52 = 86,905.24/x
  3. Step 3: Cross multiply
    138,597.28x = 191,195.52 × 86,905.24
  4. Step 4: Simplify right side
    138,597.28x = 16,615,892,552.52
  5. Step 5: Solve for x
    x = 16,615,892,552.52/138,597.28
  6. Step 6: Final answer
    x = 119,886.14

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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.