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Finding the Fourth Proportional to 139,368.60, 209,052.90 and 114,764.85

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Solution

The fourth proportional to 139,368.60, 209,052.90 and 114,764.85 is: 172,147.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,368.60 : 209,052.90 = 114,764.85 : x
  2. Step 2: Convert to fraction form
    139,368.60/209,052.90 = 114,764.85/x
  3. Step 3: Cross multiply
    139,368.60x = 209,052.90 × 114,764.85
  4. Step 4: Simplify right side
    139,368.60x = 23,991,924,710.57
  5. Step 5: Solve for x
    x = 23,991,924,710.57/139,368.60
  6. Step 6: Final answer
    x = 172,147.28

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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.