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Finding the Fourth Proportional to 139,949.58, 210,011.85 and 56,843.58

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Solution

The fourth proportional to 139,949.58, 210,011.85 and 56,843.58 is: 85,300.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,949.58 : 210,011.85 = 56,843.58 : x
  2. Step 2: Convert to fraction form
    139,949.58/210,011.85 = 56,843.58/x
  3. Step 3: Cross multiply
    139,949.58x = 210,011.85 × 56,843.58
  4. Step 4: Simplify right side
    139,949.58x = 11,937,825,396.42
  5. Step 5: Solve for x
    x = 11,937,825,396.42/139,949.58
  6. Step 6: Final answer
    x = 85,300.90

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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.