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Finding the Fourth Proportional to 159,322.92, 219,871.90 and 87,709.60

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Solution

The fourth proportional to 159,322.92, 219,871.90 and 87,709.60 is: 121,042.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,322.92 : 219,871.90 = 87,709.60 : x
  2. Step 2: Convert to fraction form
    159,322.92/219,871.90 = 87,709.60/x
  3. Step 3: Cross multiply
    159,322.92x = 219,871.90 × 87,709.60
  4. Step 4: Simplify right side
    159,322.92x = 19,284,876,400.24
  5. Step 5: Solve for x
    x = 19,284,876,400.24/159,322.92
  6. Step 6: Final answer
    x = 121,042.70

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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.