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Finding the Fourth Proportional to 159,489.84, 220,071.96 and 90,568.56

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Solution

The fourth proportional to 159,489.84, 220,071.96 and 90,568.56 is: 124,970.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    159,489.84 : 220,071.96 = 90,568.56 : x
  2. Step 2: Convert to fraction form
    159,489.84/220,071.96 = 90,568.56/x
  3. Step 3: Cross multiply
    159,489.84x = 220,071.96 × 90,568.56
  4. Step 4: Simplify right side
    159,489.84x = 19,931,600,513.58
  5. Step 5: Solve for x
    x = 19,931,600,513.58/159,489.84
  6. Step 6: Final answer
    x = 124,970.97

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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.