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Finding the Fourth Proportional to 134,615.65, 185,770.86 and 74,188.50

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Solution

The fourth proportional to 134,615.65, 185,770.86 and 74,188.50 is: 102,380.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,615.65 : 185,770.86 = 74,188.50 : x
  2. Step 2: Convert to fraction form
    134,615.65/185,770.86 = 74,188.50/x
  3. Step 3: Cross multiply
    134,615.65x = 185,770.86 × 74,188.50
  4. Step 4: Simplify right side
    134,615.65x = 13,782,061,447.11
  5. Step 5: Solve for x
    x = 13,782,061,447.11/134,615.65
  6. Step 6: Final answer
    x = 102,380.83

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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.