Home / 147,620.20-220,847.10-128,115.40

Finding the Fourth Proportional to 147,620.20, 220,847.10 and 128,115.40

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Solution

The fourth proportional to 147,620.20, 220,847.10 and 128,115.40 is: 191,666.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    147,620.20 : 220,847.10 = 128,115.40 : x
  2. Step 2: Convert to fraction form
    147,620.20/220,847.10 = 128,115.40/x
  3. Step 3: Cross multiply
    147,620.20x = 220,847.10 × 128,115.40
  4. Step 4: Simplify right side
    147,620.20x = 28,293,914,555.34
  5. Step 5: Solve for x
    x = 28,293,914,555.34/147,620.20
  6. Step 6: Final answer
    x = 191,666.96

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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.