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Finding the Fourth Proportional to 159,481.81, 220,084.39 and 87,861.21

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Solution

The fourth proportional to 159,481.81, 220,084.39 and 87,861.21 is: 121,248.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,481.81 : 220,084.39 = 87,861.21 : x
  2. Step 2: Convert to fraction form
    159,481.81/220,084.39 = 87,861.21/x
  3. Step 3: Cross multiply
    159,481.81x = 220,084.39 × 87,861.21
  4. Step 4: Simplify right side
    159,481.81x = 19,336,880,807.51
  5. Step 5: Solve for x
    x = 19,336,880,807.51/159,481.81
  6. Step 6: Final answer
    x = 121,248.19

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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.