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Finding the Fourth Proportional to 131,497.70, 197,246.55 and 81,415.40

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Solution

The fourth proportional to 131,497.70, 197,246.55 and 81,415.40 is: 122,123.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    131,497.70 : 197,246.55 = 81,415.40 : x
  2. Step 2: Convert to fraction form
    131,497.70/197,246.55 = 81,415.40/x
  3. Step 3: Cross multiply
    131,497.70x = 197,246.55 × 81,415.40
  4. Step 4: Simplify right side
    131,497.70x = 16,058,906,766.87
  5. Step 5: Solve for x
    x = 16,058,906,766.87/131,497.70
  6. Step 6: Final answer
    x = 122,123.10

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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.