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Finding the Fourth Proportional to 131,721.60, 197,355.60 and 61,456.80

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Solution

The fourth proportional to 131,721.60, 197,355.60 and 61,456.80 is: 92,079.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,721.60 : 197,355.60 = 61,456.80 : x
  2. Step 2: Convert to fraction form
    131,721.60/197,355.60 = 61,456.80/x
  3. Step 3: Cross multiply
    131,721.60x = 197,355.60 × 61,456.80
  4. Step 4: Simplify right side
    131,721.60x = 12,128,843,638.08
  5. Step 5: Solve for x
    x = 12,128,843,638.08/131,721.60
  6. Step 6: Final answer
    x = 92,079.38

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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.