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Finding the Fourth Proportional to 159,887.91, 220,641.81 and 87,288.32

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Solution

The fourth proportional to 159,887.91, 220,641.81 and 87,288.32 is: 120,455.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,887.91 : 220,641.81 = 87,288.32 : x
  2. Step 2: Convert to fraction form
    159,887.91/220,641.81 = 87,288.32/x
  3. Step 3: Cross multiply
    159,887.91x = 220,641.81 × 87,288.32
  4. Step 4: Simplify right side
    159,887.91x = 19,259,451,813.45
  5. Step 5: Solve for x
    x = 19,259,451,813.45/159,887.91
  6. Step 6: Final answer
    x = 120,455.96

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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.