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Finding the Fourth Proportional to 162,664.20, 243,704.70 and 139,336.20

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Solution

The fourth proportional to 162,664.20, 243,704.70 and 139,336.20 is: 208,754.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,664.20 : 243,704.70 = 139,336.20 : x
  2. Step 2: Convert to fraction form
    162,664.20/243,704.70 = 139,336.20/x
  3. Step 3: Cross multiply
    162,664.20x = 243,704.70 × 139,336.20
  4. Step 4: Simplify right side
    162,664.20x = 33,956,886,820.14
  5. Step 5: Solve for x
    x = 33,956,886,820.14/162,664.20
  6. Step 6: Final answer
    x = 208,754.52

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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.