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Finding the Fourth Proportional to 131,912.10, 197,953.20 and 72,790.20

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Solution

The fourth proportional to 131,912.10, 197,953.20 and 72,790.20 is: 109,232.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,912.10 : 197,953.20 = 72,790.20 : x
  2. Step 2: Convert to fraction form
    131,912.10/197,953.20 = 72,790.20/x
  3. Step 3: Cross multiply
    131,912.10x = 197,953.20 × 72,790.20
  4. Step 4: Simplify right side
    131,912.10x = 14,409,053,018.64
  5. Step 5: Solve for x
    x = 14,409,053,018.64/131,912.10
  6. Step 6: Final answer
    x = 109,232.23

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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.