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Finding the Fourth Proportional to 134,105.20, 201,311.40 and 78,732.40

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Solution

The fourth proportional to 134,105.20, 201,311.40 and 78,732.40 is: 118,188.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    134,105.20 : 201,311.40 = 78,732.40 : x
  2. Step 2: Convert to fraction form
    134,105.20/201,311.40 = 78,732.40/x
  3. Step 3: Cross multiply
    134,105.20x = 201,311.40 × 78,732.40
  4. Step 4: Simplify right side
    134,105.20x = 15,849,729,669.36
  5. Step 5: Solve for x
    x = 15,849,729,669.36/134,105.20
  6. Step 6: Final answer
    x = 118,188.78

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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.