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Finding the Fourth Proportional to 154,223.40, 231,335.10 and 127,979.40

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Solution

The fourth proportional to 154,223.40, 231,335.10 and 127,979.40 is: 191,969.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    154,223.40 : 231,335.10 = 127,979.40 : x
  2. Step 2: Convert to fraction form
    154,223.40/231,335.10 = 127,979.40/x
  3. Step 3: Cross multiply
    154,223.40x = 231,335.10 × 127,979.40
  4. Step 4: Simplify right side
    154,223.40x = 29,606,127,296.94
  5. Step 5: Solve for x
    x = 29,606,127,296.94/154,223.40
  6. Step 6: Final answer
    x = 191,969.10

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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.