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Finding the Fourth Proportional to 156,539.63, 216,025.10 and 84,919.65

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Solution

The fourth proportional to 156,539.63, 216,025.10 and 84,919.65 is: 117,189.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,539.63 : 216,025.10 = 84,919.65 : x
  2. Step 2: Convert to fraction form
    156,539.63/216,025.10 = 84,919.65/x
  3. Step 3: Cross multiply
    156,539.63x = 216,025.10 × 84,919.65
  4. Step 4: Simplify right side
    156,539.63x = 18,344,776,659.79
  5. Step 5: Solve for x
    x = 18,344,776,659.79/156,539.63
  6. Step 6: Final answer
    x = 117,189.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.