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Finding the Fourth Proportional to 131,662.35, 197,159.40 and 72,431.10

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Solution

The fourth proportional to 131,662.35, 197,159.40 and 72,431.10 is: 108,462.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,662.35 : 197,159.40 = 72,431.10 : x
  2. Step 2: Convert to fraction form
    131,662.35/197,159.40 = 72,431.10/x
  3. Step 3: Cross multiply
    131,662.35x = 197,159.40 × 72,431.10
  4. Step 4: Simplify right side
    131,662.35x = 14,280,472,217.34
  5. Step 5: Solve for x
    x = 14,280,472,217.34/131,662.35
  6. Step 6: Final answer
    x = 108,462.84

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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.