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Finding the Fourth Proportional to 162,705.20, 243,798.60 and 120,714.80

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Solution

The fourth proportional to 162,705.20, 243,798.60 and 120,714.80 is: 180,879.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,705.20 : 243,798.60 = 120,714.80 : x
  2. Step 2: Convert to fraction form
    162,705.20/243,798.60 = 120,714.80/x
  3. Step 3: Cross multiply
    162,705.20x = 243,798.60 × 120,714.80
  4. Step 4: Simplify right side
    162,705.20x = 29,430,099,239.28
  5. Step 5: Solve for x
    x = 29,430,099,239.28/162,705.20
  6. Step 6: Final answer
    x = 180,879.89

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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.