Home / 156,705.21-216,249.92-85,085.29

Finding the Fourth Proportional to 156,705.21, 216,249.92 and 85,085.29

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Solution

The fourth proportional to 156,705.21, 216,249.92 and 85,085.29 is: 117,415.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    156,705.21 : 216,249.92 = 85,085.29 : x
  2. Step 2: Convert to fraction form
    156,705.21/216,249.92 = 85,085.29/x
  3. Step 3: Cross multiply
    156,705.21x = 216,249.92 × 85,085.29
  4. Step 4: Simplify right side
    156,705.21x = 18,399,687,155.68
  5. Step 5: Solve for x
    x = 18,399,687,155.68/156,705.21
  6. Step 6: Final answer
    x = 117,415.92

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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.