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Finding the Fourth Proportional to 135,956.50, 187,615.90 and 74,702.58

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Solution

The fourth proportional to 135,956.50, 187,615.90 and 74,702.58 is: 103,087.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    135,956.50 : 187,615.90 = 74,702.58 : x
  2. Step 2: Convert to fraction form
    135,956.50/187,615.90 = 74,702.58/x
  3. Step 3: Cross multiply
    135,956.50x = 187,615.90 × 74,702.58
  4. Step 4: Simplify right side
    135,956.50x = 14,015,392,434.28
  5. Step 5: Solve for x
    x = 14,015,392,434.28/135,956.50
  6. Step 6: Final answer
    x = 103,087.33

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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.