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Finding the Fourth Proportional to 219,883.40, 329,760.30 and 86,719.40

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Solution

The fourth proportional to 219,883.40, 329,760.30 and 86,719.40 is: 130,053.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,883.40 : 329,760.30 = 86,719.40 : x
  2. Step 2: Convert to fraction form
    219,883.40/329,760.30 = 86,719.40/x
  3. Step 3: Cross multiply
    219,883.40x = 329,760.30 × 86,719.40
  4. Step 4: Simplify right side
    219,883.40x = 28,596,615,359.82
  5. Step 5: Solve for x
    x = 28,596,615,359.82/219,883.40
  6. Step 6: Final answer
    x = 130,053.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.