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Finding the Fourth Proportional to 131,803.80, 197,436.90 and 81,730.20

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Solution

The fourth proportional to 131,803.80, 197,436.90 and 81,730.20 is: 122,428.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,803.80 : 197,436.90 = 81,730.20 : x
  2. Step 2: Convert to fraction form
    131,803.80/197,436.90 = 81,730.20/x
  3. Step 3: Cross multiply
    131,803.80x = 197,436.90 × 81,730.20
  4. Step 4: Simplify right side
    131,803.80x = 16,136,557,324.38
  5. Step 5: Solve for x
    x = 16,136,557,324.38/131,803.80
  6. Step 6: Final answer
    x = 122,428.62

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1.5x scale

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.