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Finding the Fourth Proportional to 162,518.70, 243,871.20 and 87,638.52

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Solution

The fourth proportional to 162,518.70, 243,871.20 and 87,638.52 is: 131,508.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    162,518.70 : 243,871.20 = 87,638.52 : x
  2. Step 2: Convert to fraction form
    162,518.70/243,871.20 = 87,638.52/x
  3. Step 3: Cross multiply
    162,518.70x = 243,871.20 × 87,638.52
  4. Step 4: Simplify right side
    162,518.70x = 21,372,511,038.62
  5. Step 5: Solve for x
    x = 21,372,511,038.62/162,518.70
  6. Step 6: Final answer
    x = 131,508.01

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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.