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Finding the Fourth Proportional to 139,620.45, 209,373.26 and 55,369.01

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Solution

The fourth proportional to 139,620.45, 209,373.26 and 55,369.01 is: 83,030.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,620.45 : 209,373.26 = 55,369.01 : x
  2. Step 2: Convert to fraction form
    139,620.45/209,373.26 = 55,369.01/x
  3. Step 3: Cross multiply
    139,620.45x = 209,373.26 × 55,369.01
  4. Step 4: Simplify right side
    139,620.45x = 11,592,790,126.67
  5. Step 5: Solve for x
    x = 11,592,790,126.67/139,620.45
  6. Step 6: Final answer
    x = 83,030.75

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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.