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Finding the Fourth Proportional to 129,222.80, 193,396.80 and 113,476.40

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Solution

The fourth proportional to 129,222.80, 193,396.80 and 113,476.40 is: 169,830.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    129,222.80 : 193,396.80 = 113,476.40 : x
  2. Step 2: Convert to fraction form
    129,222.80/193,396.80 = 113,476.40/x
  3. Step 3: Cross multiply
    129,222.80x = 193,396.80 × 113,476.40
  4. Step 4: Simplify right side
    129,222.80x = 21,945,972,635.52
  5. Step 5: Solve for x
    x = 21,945,972,635.52/129,222.80
  6. Step 6: Final answer
    x = 169,830.50

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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.