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Finding the Fourth Proportional to 139,118.20, 191,770.84 and 85,303.44

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Solution

The fourth proportional to 139,118.20, 191,770.84 and 85,303.44 is: 117,588.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,118.20 : 191,770.84 = 85,303.44 : x
  2. Step 2: Convert to fraction form
    139,118.20/191,770.84 = 85,303.44/x
  3. Step 3: Cross multiply
    139,118.20x = 191,770.84 × 85,303.44
  4. Step 4: Simplify right side
    139,118.20x = 16,358,712,343.69
  5. Step 5: Solve for x
    x = 16,358,712,343.69/139,118.20
  6. Step 6: Final answer
    x = 117,588.59

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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.