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Finding the Fourth Proportional to 132,138.80, 197,803.20 and 72,792.80

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Solution

The fourth proportional to 132,138.80, 197,803.20 and 72,792.80 is: 108,966.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    132,138.80 : 197,803.20 = 72,792.80 : x
  2. Step 2: Convert to fraction form
    132,138.80/197,803.20 = 72,792.80/x
  3. Step 3: Cross multiply
    132,138.80x = 197,803.20 × 72,792.80
  4. Step 4: Simplify right side
    132,138.80x = 14,398,648,776.96
  5. Step 5: Solve for x
    x = 14,398,648,776.96/132,138.80
  6. Step 6: Final answer
    x = 108,966.09

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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.