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Finding the Fourth Proportional to 147,698.10, 221,219.10 and 128,015.10

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Solution

The fourth proportional to 147,698.10, 221,219.10 and 128,015.10 is: 191,738.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,698.10 : 221,219.10 = 128,015.10 : x
  2. Step 2: Convert to fraction form
    147,698.10/221,219.10 = 128,015.10/x
  3. Step 3: Cross multiply
    147,698.10x = 221,219.10 × 128,015.10
  4. Step 4: Simplify right side
    147,698.10x = 28,319,385,208.41
  5. Step 5: Solve for x
    x = 28,319,385,208.41/147,698.10
  6. Step 6: Final answer
    x = 191,738.32

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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.