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Finding the Fourth Proportional to 131,772.60, 197,205.30 and 79,219.80

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Solution

The fourth proportional to 131,772.60, 197,205.30 and 79,219.80 is: 118,557.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,772.60 : 197,205.30 = 79,219.80 : x
  2. Step 2: Convert to fraction form
    131,772.60/197,205.30 = 79,219.80/x
  3. Step 3: Cross multiply
    131,772.60x = 197,205.30 × 79,219.80
  4. Step 4: Simplify right side
    131,772.60x = 15,622,564,424.94
  5. Step 5: Solve for x
    x = 15,622,564,424.94/131,772.60
  6. Step 6: Final answer
    x = 118,557.00

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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.