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Finding the Fourth Proportional to 101,638.80, 152,458.20 and 66,209.40

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Solution

The fourth proportional to 101,638.80, 152,458.20 and 66,209.40 is: 99,314.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,638.80 : 152,458.20 = 66,209.40 : x
  2. Step 2: Convert to fraction form
    101,638.80/152,458.20 = 66,209.40/x
  3. Step 3: Cross multiply
    101,638.80x = 152,458.20 × 66,209.40
  4. Step 4: Simplify right side
    101,638.80x = 10,094,165,947.08
  5. Step 5: Solve for x
    x = 10,094,165,947.08/101,638.80
  6. Step 6: Final answer
    x = 99,314.10

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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.