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Finding the Fourth Proportional to 159,439.72, 220,026.79 and 87,819.74

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Solution

The fourth proportional to 159,439.72, 220,026.79 and 87,819.74 is: 121,191.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,439.72 : 220,026.79 = 87,819.74 : x
  2. Step 2: Convert to fraction form
    159,439.72/220,026.79 = 87,819.74/x
  3. Step 3: Cross multiply
    159,439.72x = 220,026.79 × 87,819.74
  4. Step 4: Simplify right side
    159,439.72x = 19,322,695,490.83
  5. Step 5: Solve for x
    x = 19,322,695,490.83/159,439.72
  6. Step 6: Final answer
    x = 121,191.23

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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.