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Finding the Fourth Proportional to 131,490.72, 197,100 and 64,841.76

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Solution

The fourth proportional to 131,490.72, 197,100 and 64,841.76 is: 97,195.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,490.72 : 197,100 = 64,841.76 : x
  2. Step 2: Convert to fraction form
    131,490.72/197,100 = 64,841.76/x
  3. Step 3: Cross multiply
    131,490.72x = 197,100 × 64,841.76
  4. Step 4: Simplify right side
    131,490.72x = 12,780,310,896
  5. Step 5: Solve for x
    x = 12,780,310,896/131,490.72
  6. Step 6: Final answer
    x = 97,195.54

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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.