Home / 156,439.88-215,886-84,819.68

Finding the Fourth Proportional to 156,439.88, 215,886 and 84,819.68

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Solution

The fourth proportional to 156,439.88, 215,886 and 84,819.68 is: 117,050.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,439.88 : 215,886 = 84,819.68 : x
  2. Step 2: Convert to fraction form
    156,439.88/215,886 = 84,819.68/x
  3. Step 3: Cross multiply
    156,439.88x = 215,886 × 84,819.68
  4. Step 4: Simplify right side
    156,439.88x = 18,311,381,436.48
  5. Step 5: Solve for x
    x = 18,311,381,436.48/156,439.88
  6. Step 6: Final answer
    x = 117,050.60

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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.