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Finding the Fourth Proportional to 139,818.96, 209,699.08 and 45,057.67

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Solution

The fourth proportional to 139,818.96, 209,699.08 and 45,057.67 is: 67,577.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,818.96 : 209,699.08 = 45,057.67 : x
  2. Step 2: Convert to fraction form
    139,818.96/209,699.08 = 45,057.67/x
  3. Step 3: Cross multiply
    139,818.96x = 209,699.08 × 45,057.67
  4. Step 4: Simplify right side
    139,818.96x = 9,448,551,309.05
  5. Step 5: Solve for x
    x = 9,448,551,309.05/139,818.96
  6. Step 6: Final answer
    x = 67,577.04

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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.