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Finding the Fourth Proportional to 191,615.56, 287,425.02 and 66,956.84

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Solution

The fourth proportional to 191,615.56, 287,425.02 and 66,956.84 is: 100,435.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    191,615.56 : 287,425.02 = 66,956.84 : x
  2. Step 2: Convert to fraction form
    191,615.56/287,425.02 = 66,956.84/x
  3. Step 3: Cross multiply
    191,615.56x = 287,425.02 × 66,956.84
  4. Step 4: Simplify right side
    191,615.56x = 19,245,071,076.14
  5. Step 5: Solve for x
    x = 19,245,071,076.14/191,615.56
  6. Step 6: Final answer
    x = 100,435.85

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.